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 Engineers know, and take his advice; he is in command, of all mining operations."

In ten minntes Major Anderson was on the ground.

"The fellows are taking to mining in earnest," he said; "this is the third we have discovered to-day, and how many more there may be, goodness only knows. I think you had better begin here," he said to Mr. Gubbins. "You have got tools, I think. Say about six feet square, then two men can work at once. I will be here the first thing in the morning, and then we will look round and see which is the likeliest spot for the fellows to be working from. Will you ask your sentries on the roof to listen closely to-night in order to detect, if possible, a stir of men coming or going from any given point."

Picks and shovels were brought out, the garrison told off into working parties of four each, to relieve each other every hour, and the work began. Well-sinking is hard work, in any climate; but with a thermometer marking a hundred and five at night, it is terrible; and each set of workers, as they came up bathed in perspiration, threw themselves on the ground utterly exhausted. Mr. Hargreaves and a few of the elders of the garrison were excused this work, and took extra duty on the terrace and battery.

The next day it was decided that the enemy were probably working from a ruined house near their former battery, and a gallery was begun from the bottom of the shaft. This was pushed on night and day for three days, the workers being now certain, from the rapidly-increasing sound of the workers, that this was the line by which the enemy was approaching. The gallery was driven nearly twenty yards, and then three barrels of powder were stored there, and the besieged awaited the approach of the rebels' gallery.