Halfway up he began talking to himself, and abruptly turned a ghastly face on his helper.

"What can be happening ?" he asked with a gaunt illustrative hand.

"What can be happening?
Spin, spin, spin, spin.

It goes round and round, round and round for evermore." He stood with his hand circling.
"It's all right, old chap," said Isbister with the air of an old friend.
"Don't worry yourself.

Trust to me," The man dropped his hand and turned again.