I shall make it fifteen inches deep, and then charge it with the contents of a dozen cartridges.

I think that ought to do it." In two days and a half, the hole was of the required depth.

Harry had progressed so rapidly that he was able, that morning, to walk across his room.
"We must try the shot, at once," Stanley said, "because if it fails, we must go on working.

If it succeeds we can, if we like, wait for another week before we make off.

By that time you will be strong enough to be got through that low passage, and walk for a little distance; when we can cut some poles, and rig up that hammock again.
"Do you know anything about mining, for I know nothing?
I only had an idea how to drill the hole from seeing some engineers at work at Agra, years ago; but I am sure I don't know how they fired the shot, or prepared it." "I can tell you a little about it, Stanley; for I have been down a coal mine once or twice, and watched the men doing it.