He was thus seated as it were upon nothing, but retaining his position by the pressure of his arms and feet and his whole body.

Still retaining this position, very slowly, very laboriously, he worked himself up the angle, stopping now and then to regain his breath, now and then slipping back an inch.

But he mounted towards the top, and after a while the back of his head no longer touched the bricks.

His head was above the coping of the wall.
It was at this moment that he saw the lantern again, just at the corner where he had turned.

The lantern advanced slowly; it was now held aloft, now close to the ground.