Sometimes he rose suddenly from his chair as if driven out, and paced the deck for hours.

People noticed his propensity for walking in rough weather, and watched him curiously as he did his rounds.

From his abstraction and the determined set of his jaw, they fancied he must be thinking about his bridge.

Every one had heard of the new cantilever bridge in Canada.
But Alexander was not thinking about his work.

After the fourth night out, when his will suddenly softened under his hands, he had been continually hammering away at himself.