At last I found it, and ascertained by touch that the lock had sunk one-sixteenth of an inch, due to bad setting by myself or because the ground had subsided after the rain. I firmed it into its place. Then, to explain ourselves plausibly to the enemy, we began blowing up things to the north of the mine. We found a little four-arch bridge and put it into the air. Afterwards we turned to rails and cut about two hundred: and while the men were laying and lighting charges I taught Mohammed to climb a splintery pole; together we cut the wires, and with their purchase dragged down other poles. All was done at speed, for we feared lest Turks come after us: and when our explosive work was finished we ran back like hares to our camels, mounted them, and trotted without interruption down the windy valley once more to the plain of Hamdh.