I left Maud to pull on it while I went below.

By the light of the lantern I saw the butt twist slowly around till its sides coincided with the sides of the step.

Maud made fast and returned to the windlass.

Slowly the butt descended the several intervening inches, at the same time slightly twisting again.

Again Maud rectified the twist with the watch-tackle, and again she lowered away from the windlass.
Square fitted into square.