Harry and Phra exchanged glances, and then they shuddered.
Sree was waiting with the men when they descended to the terrace, where, refreshed by their meal, the second party had assembled, ready for anything that might happen that day; eager also to see what Mr. Kenyon and the doctor would suggest.
The first thing done was to send scouts once more to try and find out whether an advance was being prepared. While they were absent, Mr. Kenyon, after explaining to the King his plans, asked for the gates to be opened, so that he and his men could pass out with an advance guard of about twenty, to screen as well as protect them while the mine was prepared.
The distance was so short that there was no scruple about the gates being unclosed, though both Harry and Phra looked upon the posting of the guard across the pathway outside the defences as being like a defiance and invitation to the enemy in one, and Harry told his father their thoughts.
"Exactly what I thought myself, Hal, but it must be done; and what I hope they will think is that we have become emboldened by the defeat we gave them last night, and have advanced to meet them in fair fight outside."
"They will be watching, of course," said Phra.
"Yes, and that is why I have placed the men to cover us. No more words. Now to get the mines made as quickly as possible."
There was this difficulty in making the mines: to be effective, it was necessary that they should be as near the gates as possible, for there the greater part of the enemy would crowd to the attack; but if they were too close, they might blow down the defences and inflict injury upon their friends; while if they were too far off, they would be ineffective from the attacking party being few.
The only thing to be done was to choose the medium way, and the men were set to work to dig two small, deep holes, each capable of holding one of the powder kegs, and in each case the head was taken out before it was laid upon its side. But previously a narrow trench of about a foot in depth was dug, leading from the head of the cask right in through the gates. This finished, stout matting was laid over the keg and a loaded gun placed in the trench, already cocked, so that when the trigger was pulled by means of a wire, the flash from the gun would explode the powder. Then the wire was run through a number of large bamboos such as were used—after boring through the divisions—for water, and these were laid along the trench and through the gateway.
The result of this was that when the wire was pulled it would run easily and not be checked by the earth with which the trench was again to be filled, so that, the wire being attached to the trigger of the gun, the mine could be sprung in safety by those within the gates.