"I don't know what to think about it. I have no idea what effect dynamite would have when exploded at a distance of thirty or forty feet below a bridge. Certainly it would blow the roadway up, but I have very great doubts whether it would so twist or smash the main girders as to render the bridge impassable. The distance to the first pier is not great, and unless one entirely destroyed the bridge, I should say that it could be repaired very soon—I mean, in a week or two—by a strong gang. If the girders kept their places, two or three days' work might patch it up temporarily. If it were destroyed altogether as far as the first pier, it would stop the cannon getting over till a temporary bridge is constructed; but by rigging up some strong cables, they could pass cases of musket ammunition across the gap in the same way, you know, as I have seen pictures of shipwrecked people being swung along under a cable in a sort of cradle. What do you think, Peters?"

"Two hundred pounds of dynamite would do a lot of damage, Chris. I should think that it would certainly bring the wall down."

"I have no doubt that it would do that, Peters, but the ironwork goes some ten yards farther, and no doubts rests on the solid rock. I expect the wall is put there more to finish the thing off than to carry much of the weight. Again, you see it is only a single line, and not above ten feet wide, which is against us, for the wider the line the better chance it has of being smashed by an explosion some forty feet below it. Well, we will have another look at the bridge and the waggons to-morrow. Of course the bridge is the great thing if it can be managed, though I don't say that blowing up the yard would not be a good thing if we can't make sure of the other. Anyhow, we need not feel down-hearted about it. We came up here on the chance, and even though we may not be able to do exactly what we want, we ought to manage to do them a lot of damage."

After eating their supper they turned in to their two little tents. The spirit-lamp had been extinguished, and as they had not the least fear of discovery, they did not consider it necessary to place a sentinel. In the morning they were out again early and at their former post of observation.

"What are they up to now?" Brown said an hour later when he saw a party of Boers come down the opposite side close to the bridge, carrying posts and planks.

Chris made no answer, he was watching them intently. They stopped near the bank of the river close to the bridge. Then some of them set to work to level a space of ground, while others made holes at the corners.

"I am afraid that it is all up with our plans as far as the bridge is concerned. They are going to put up a hut there, and I have not the least doubt it means they are going to station a guard under the bridge. If they do it that side, they are probably doing the same on this, only we can't see them. The Boers are stupid enough in some things, but they are sharp enough in others, and it is possible that the commando from Barberton has come upon one of the kraals where we slept, and asking a lot of questions about us, they have found out that we had four heavy boxes with us, and the idea may have struck them that these contained explosives. If that did occur to them, it is almost certain that a man has been sent off at once to Barberton with orders to telegraph here and to other bridges, to take every precaution against their being blown up. Anyhow, there is a hut building there, and I don't see that it can be for any other purpose."

After three hours' work the hut was completed, and a party of eight men brought down blankets and other kit. Two of these at once ascended the bank with their rifles and sat down at the foot of the wall.

"That ends the business," Chris said. "However, I will creep round to a point where I can get a view of this side of the bridge. Possibly they have only taken precautions on their own side, for we were travelling for some time in the Swazis' country to the west of the Komati, and that is where they will have heard of us." He crawled away among the rocks, and rejoined his companions an hour later.

"It is just the same this side. They have settled the question for us. Now we will give our attention to the waggons."