So he went on at a walking pace and the unseen companion walked and breathed beside him.

They waited till the cloud covered the moon and then, first at a walking pace and afterwards at a gentle trot, made for the shore.

According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.