on the following morning, but when daylight appeared we found that the men, although they had labored with a will, had only been able to work for an hour at low water and that four tides must ebb before the mine had been sunk to the required depth.
Not until eight o'clock on the morning of the 23d was the work complete. The hole was bored obliquely in the rock, and was large enough to contain about ten pounds of explosive matter. Just as the picrate was being introduced into the aperture, Falsten interposed:
"Stop," he said, "I think it will be best to mix the picrate with common powder, as that will allow us to fire the mine with a match instead of the gun-priming which would be necessary to produce a shock. Besides, it is an understood thing that the addition of gunpowder renders picrate far more effective in blasting such rocks as this, as then the violence of the picrate prepares the way for the powder which, slower in its action, will complete the disseverment of the basalt."
Falsten is not a great talker, but what he does say is always very much to the point. His good advice was immediately followed; the two substances were mixed together, and after a match had been introduced the compound was rammed closely into the hole.
Notwithstanding that the Chancellor was at a distance from the rocks that insured her from any danger of being injured by the explosion, it was thought advisable that the passengers and crew should take refuge in the grotto at the extremity of the reef, and even Mr. Kear, in spite of his many objections, was forced to leave the ship. Falsten, as soon as he had set fire to the match, joined us in our retreat.
The train was to burn for ten minutes, and at the end of that time the explosion took place; the report, on account of the depth of the mine, being muffled, and much less noisy than we had expected. But the operation had been perfectly successful. Before we reached the ridge we could see that the basalt had been literally reduced to powder, and that a little channel, already being filled by the rising tide, had been cut right through the obstacle. A loud hurrah rang through the air; our prison-doors were opened, and we were prisoners no more.
At high tide the Chancellor weighed anchor and floated
