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Rh of forty yards; while had he accomplished it in safety, he would have slithered down the farther side into a great cavity shaped like an egg-cup, at the bottom of which a pool of dirty, stagnant water was slowly forming. Moreover, if we imagine the man continuing his journey and climbing up the other side, he would run the gauntlet of the English snipers as he topped the farther lip, before reaching the German sap which ran out in just such a similar cul-de-sac to the one already described.

Thus are craters consolidated; each side holds the lip nearest to them, and hurls curses and bombs at his opponents on the other. The distance between the sapheads is perhaps twenty or twenty-five yards, instead of the hundred odd of the parent fire-trenches; and any closer acquaintanceship is barred by the egg-cup crater, which stretches between them.

"Keep down, sir—well down. Lot of sniping to-day." A sergeant of the South Loamshires whispered hoarsely to the Sapper as he reached the end of the sap—it is etiquette to whisper in a sap. Three men inside the recess were drinking tea with the calmness born of long custom, while lying on his side, with a periscope to his eye, was Jackson, the subaltern.

"Anything fresh, Jacko?" muttered the Sapper, crouching down beside him.

"Yes—I think they're coming closer with their left sap round the crater. Their periscope seems to be nearer than it was yesterday."

"Let's have a look." The two changed position,