R. M. Ballantyne 
Rivers of Ice 

Excerpt: "On a certain summer morning, about the middle of the present century, a big bluff man, of seafaring aspect, found himself sauntering in a certain street near London Bridge. He was a man of above fifty, but looked under forty in consequence of the healthful vigour of his frame, the freshness of his saltwater face, and the blackness of his shaggy hair."