Having given up all hopes of blowing up the bridge, Chris and his comrades turned their whole attention to the lines of waggons. The train that had come in on the previous evening had added to the number, although it had taken some of them away with it up country. They now made out that there were eight waggons piled with cases, that almost certainly contained rifles; six with tarpaulins closely packed over them, and these they guessed contained ammunition boxes; four, each with two large cases that might contain field guns; while the two with what they were sure were big guns still remained on the siding.  
"I should say that about four or five pounds of dynamite would be an abundance for each of those ammunition waggons; less than that would do, as we could, by slitting the tarpaulins, put a pound among the cases, and if one case were exploded it would set all the others off. There is no trouble about them. I will just take a note. They are on the second siding; there are eight other waggons in front of them and six behind, so we cannot make any mistake about that. There must be a good heavy charge under the rifle trucks, for we shall have to blow them all well into the air to bend and damage them enough to be altogether unserviceable. As for the guns, and especially the heavy ones, it is a difficult question. Of course, if we could open the cases and get at the breech-pieces, and put dynamite among them, we could damage all the mechanism so much that the guns would be useless until new breech-pieces were made, which I fancy must be altogether beyond the Boers; but as there is no possibility of opening them, we must trust to blowing the guns so high in the air that they will be too much damaged for use by the explosion and fall. We have got altogether two hundredweight; now two pounds to each ammunition waggon will take twelve pounds. What shall we say for the rifles?"
 
"Ten pounds," Brown suggested.
 
"That would take eighty more pounds," Willesden objected, "which would make a big hole in our stores."
 
"We must have a good charge," Chris said. "Suppose we say nine pounds to each, that will save eight pounds; fifteen pounds apiece ought to give the eight cases which we suppose hold field-guns a good hoist; that will leave us with over a hundred pounds, fifty for each of the big guns. Now that we have seen all that is necessary, we may as well be off and begin to get ready."
 
The covers were taken off the boxes of dynamite, and these were unscrewed, and the explosive was with great care divided into the portions as agreed upon. Two of the cases furnished just sufficient for the ammunition waggons and the two big guns, the other two for the smaller cannon and the trucks with the rifles. The charges were sewn up in pieces of the canvas, the smaller charges for the ammunition boxes being enclosed in thinner stuff that had been sewn under the canvas used in packing; the fuses and detonators were then cut and inserted. Chris was perfectly up in this work, having performed the operation scores of times in the mines. The length it should burn was only decided after a discussion.
 
There would be in all nineteen charges to explode, and these were in three groups at some little distance from each other, all the cannon being on the same siding. It would be necessary, perhaps, to wait for some time till all these were free from observation by natives or others who might be moving about the yard, then a signal must be given that they could all see. It would not take long to light the fuses, for each of them would be provided with a slow match, which burns with but a spark, and could be held under a hat or an inverted tin cup till the time came for using it. The question was how far must they be away to ensure their own safety, and Chris maintained that at least four or five hundred yards would be necessary to place them in even comparative safety from the rain of fragments that would fall over a wide area. Finally it was agreed to cut the fuses to a length to burn four minutes; this would allow a minute for any hitch that might occur in lighting them, and three minutes to burn. It was of course important that they should be no longer than was absolutely necessary, as there existed a certain risk that one of the little sparks might be seen by a passing Kaffir, or, as was still more probable, the smell of burning powder should attract attention. It was agreed that Chris should light the fuses at the cannon, which were farthest from the others, that Peters should see to the six rifle trucks, and Willesden and Brown attend the eight trucks with the ammunition, one to begin at each end of the line.
 
When each had finished his work, he was to run straight away in the direction of the encampment, and all were to throw themselves down when they felt sure that the time for the explosions had arrived. As soon as all was over they were to meet at their place of encampment. Tents and all stores were to be removed before the work began to the ravine where the horses were, the men with them being charged to stand at the animals' heads, as there would be a great explosion, and the horses might break loose and stampede. The matter that puzzled them the most was how, when they reached their respective stations—separated from each other by lines of waggons, and in some cases by distances of a couple of hundred yards—they were to know when the work of lighting the fuses was to begin. It could not be done by sound, for this would reach the ears of any awake in the yard or the sentries at the bridge. Chris at last suggested a plan.
 
"When we start, Jack shall be stationed at a point on the hillside high enough for us to see him from all points of the yard. We will show him the exact spot while it is light. When we start he shall go down with us to the edge of the yard, and as we separate will turn and go up to the point we had shown him. He will be ordered to walk up quietly, and not to hurry; that will give us ample time to get to our stations before he reaches his. We must all keep our eyes fixed on that point. He will take the dark lantern with him; when he gets there he must turn the shade off, so as to show the light for a quarter of a minute. That will be our signal to begin. It is most unlikely that anyone else will see it, but even if they did they would simply stare in that direction and wonder what it was. Of course, only a flash would be safer; but some of us might not see it, and would remain waiting for it until the other explosions took place."
 
All agreed that this would be a very good plan. Chris crawled up with Jack until he reached a spot where he commanded a perfect view of the yard, and explained to him exactly what he was to do. He had already been told what was going to take place. Knowing that the Kaffirs have very little idea of time, he said: "You will hold it open while you say slowly like this, 'I am showing the light, baas, and I hope that you can all see it.' You will say that over twice and then turn off the light, and lie down under that big rock till you hear the explosion. Wait a little, for stones and fragments will come tumbling down. When they have stopped doing so make your way straight to where the horses are; you will find us there before you. Now, repeat over to me the words you are to say slowly twice."
 
Jack did so, and finding on questioning him that he perfectly understood what he was to do, Chris went back with him to the encampment, where they remained quietly until the sun set and darkness came on. Then, according to arrangement, the four natives came in and carried all the things back to the ravine, and laid them down ready to pack the horses as soon as their masters returned.
 
The day passed slowly to the lads. All were in a state of suppressed excitement, an excitement vastly greater than they had felt during their two fights with the Boers.
 
"How they will wonder who did it when they hear the news down in Natal!" Peters said.
 
"I don't expect they will hear much about it," Chris said. "You may be sure the Boers will not say much; they make a big brag over every success, but they won't care to publish such a thing as this. Probably their papers will only say: 'An explosion of a trifling nature occurred on the Portuguese side of Komati-poort. Some barrels of powder exploded; it is unknown whether it was the result of accident or the work of spies. Due precaution will be taken to prevent the recurrence of the accident. Beyond a few natives employed at the station, no one was hurt.'"
 
The others laughed. "I suppose that will be about it, Chris. However, I have no doubt that that commando from Barberton will keep a very sharp look-out for us as we go back."
 
"Yes, but they won't catch us. We won't venture into Swaziland again, but will make our way down on the Portuguese side, following the railway till we are fairly beyond the mountain range. We can ride fast now that we have got rid of the dynamite. It will be some time before they get the news about what has happened here, for the telegraph wires are sure to be broken and the instruments smashed. I really think that our best way will be to ride straight down to Lorenzo Marques. When we get there we can very well state that we had been ordered to leave Johannesburg, and that, as the trains are so slow and so crowded with fugitives, we had ridden down. I don't suppose that we shall attract the least notice, for we know that a great many of those who had intended to stay have been ordered off. That way we shall get back to Natal in a few days and avoid all danger." The others agreed that this would be a capital plan; and the distance by the road, which they had crossed a few miles to the south, and which runs from Lorenzo Marques up to Ladysdorp and the Murchison and Klein Lemba gold-fields, would not be above seventy miles. They would wait till daybreak showed them the amount of damage that had been done, and then start, and would be down at Lorenzo Marques in the evening, when, even if the news of the explosion reached the town, the Boers' suspicions that some Englishmen were in the hills, and that it was probably their work, would not be known. Not until ten o'clock was a move made. Then they took up the packages of dynamite, and, accompanied by Jack, made their way noiselessly down to the railway yard.
 
Here they separated. Chris, aided by Jack, carried the big packets for the large guns and for the eight smaller ones. They met no one about, and depositing their packages in the right position under them—the fuses had been already inserted—they returned to the spot they had left. In a minute or two they were joined by the others. Peters had placed his parcels under the eight trucks with rifles; Willesden and Brown had cut holes in the tarpaulins of the ammunition trucks, and thrust down their charges well among the boxes. All was ready. While the others stood closely round him Jack opened the lantern just widely enough for them to light their slow matches.
 
"Now, you are not to hurry back to the place, Jack; we shall all be on the look-out for you by the time you get there. You know your instructions; you are to turn round, open the slide of the lantern, say the words I told you over twice slowly, then shut the lantern and get under that great boulder lying against the rock. You will be perfectly safe in there."
 
"I understand, baas," he said, and at once turned and went off. The others hurried to their respective posts, and then turned round and gazed at the spot where the light would be shown. In their anxiety and excitement the time seemed interminable, and each began to think that the native had somehow blundered; at last the light appeared, and they turned at once to their work. Half a minute sufficed to light the fuses, and then they hurried away cautiously until past all the waggons, and then at full speed along the hillside, their thickly-padded shoes making no noise upon the rocks. Knowing that they were sure to be confused as to the time, they had calculated before the sun had set how far they could run in three minutes, which should be, if all went well, the time they would have after leaving the yard. They thought that even on the rough ground, and in the dark, they could make a hundred and fifty yards a minute, and at about four hundred and fifty from the waggons there was a low ridge of rock behind which they would obtain protection from all fragments blown directly outwards.
 
Chris was the first to arrive, for the trucks with the cannon were those farthest away from the bridge, and he was able to run for some distance along the line before making for the elope, and therefore travelled faster than his companions, who had farther to run on broken ground. In half a minute they rushed up almost together.
 
"Throw yourselves down," Chris shouted; "we shall have it directly."
 
Twenty seconds later there was a tremendous roar and a blinding crash, and they felt the ground shake. Almost simultaneously came eight others, then in quick succession followed six other reports, and mingled with these a confused roar of innumerable shots blended together. There was a momentary pause, and then a deafening clatter as rifles, fragments of iron and wood came falling down over a wide area. Several fell close to where the lads were crouched against the rock, but none touched them. For a full half-minute the fragments continued to fall, then the boys stood up and looked round. It was too dark to see more than that the yard was a chaos; the long lines of waggons, the huts and buildings, had all disappeared; loud shouts could be heard from the other side of the bridge, but nearer to them everything was silent. There was no doubt that the success of the attempt was complete, and the lads walked back quietly until they were at the spot where the horses had been placed, Jack overtaking them just as they reached it.
 
"It was terrible, baas," he said in an awed voice. "Jack thought his life was gone. Things fell on the rock but could not break it."
 
"Nothing short of one of those big cannon would have done that, Jack. Well, we shall see in the morning what damage is done."
 
The four natives, although they had been warned, were still terribly frightened. The horses had at the first crash broken away and run up the ravine, but they had just brought them down again, still trembling and lathering with fear. For some minutes the boys patted and soothed them, and accustomed to their voices and caresses they gradually quieted down, but were very restless until day began to break. The boys had no thought of sleep. The lamp was lit and tea made, and each of the Kaffirs was given a glass of spirits and water, for they had brought up a bottle with them in case of illness or any special need; and it was evident from their chattering teeth and broken speech that the natives needed a stimulant badly. Before it became light the horses were saddled, and the five natives told to take them along the hill a mile farther. When they had seen them off the lads returned to their former post above the station. They had several times, when they looked out during the night, seen a great light in that direction, and had no doubt that some of the fallen huts had caught fire.
 
[Image: "THERE WAS A TREMENDOUS ROAR AND A BLINDING CRASH."]
 
Prepared as they were for a scene of destruction, the reality far exceeded their expectations. All the waggons within a considerable distance of the explosions were smashed into fragments, their wheels broken and the axles twisted. The ammunition trucks had disappeared, and many close to them had been completely shattered. Those in which the muskets had been were a mere heap of fragments; the rest of the trucks lay, some with their sides blown in, others comparatively uninjured. Some were piled on the top of others three or four deep; their contents were scattered over the whole yard. Boxes and cases were burst open, and their contents—including lar............