The love of a dog for his master is notorious; in the agony of death he has been known to caress his master, and everyone has heard of the dog suffering under vivisection, who licked the hand of the operator; this man, unless he had a heart of stone, must have felt remorse to the last hour of his life.

The Descent Of Man, And Selection In Relation To Sex - (ed. Read Books Ltd, 2013) - ISBN: 9781473382602