When the light was all gone he groped slowly in the dark, and prayed to the Great Ones for such help as they might afford. At times he felt the stone floor sloping up or down, and once he stumbled over a step for which no reason seemed to exist. The farther he went the damper it seemed to be, and when he was able to feel a junction or the mouth of a side passage he always chose the way which sloped downward the least. He believed, though, that his general course was down; and the vault-like smell and incrustations on the greasy walls and floor alike warned him he was burrowing deep in Leng's unwholesome table-land. But there was not any warning of the thing which came at last; only the thing itself with its terror and shock and breath-taking chaos. One moment he was groping slowly over the slippery floor of an almost level place, and the next he was shooting dizzily downward in the dark through a burrow which must have been well-nigh vertical.