Some twenty rounds below the platform, twilight fell. Looking up, I saw a low green heaven mottled with vanishing bells of white; looking around, except for the weedy spokes and shafts of the ladder, nothing but a green gloaming, somewhat opaque but very restful and delicious. Thirty rounds lower, I stepped off on the _pierres perdues_ of the foundation; a dumb helmeted figure took me by the hand, and made a gesture (as I read it) of encouragement; and looking in at the creature’s window, I beheld the face of Bain. There we were, hand to hand and (when it pleased us) eye to eye; and either might have burst himself with shouting, and not a whisper come to his companion’s hearing. Each, in his own little world of air, stood incommunicably separate. Bob had told me ere this a little tale, a five minutes’ drama at the bottom of the sea, which at that moment possibly shot across my mind. He was down with another, settling a stone of the sea-wall. They had it well adjusted, Bob gave the signal, the scissors were slipped, the stone set home; and it was time to turn to something else. But still his companion remained bowed over the block like a mourner on a tomb, or only raised himself to make absurd contortions and mysterious signs unknown to the vocabulary of the diver. There, then, these two stood for awhile, like the dead and the living; till there flashed a fortunate thought into Bob’s mind, and he stooped, peered through the window of that other world, and beheld the face of its inhabitant wet with streaming tears. Ah! the man was in pain! And Bob, glancing downward, saw what was the trouble: the block had been lowered on the foot of that unfortunate—he was caught alive at the bottom of the sea under fifteen tons of rock.