This section of the book is from the "Stories of Animal Sagacity" book, by William Henry Giles Kingston.
Dogs often show much regard for each other, as well as for other animals; but they certainly possess a still greater affection for human beings.
A gentleman having to proceed from the north of England to London by sea, left his favourite dog behind. While seated one night in the pit of Drury Lane Theatre—some time after his arrival in the metropolis—to his amazement, his favourite sprang upon him, covering him with caresses.
The dog, as soon as he found that his master had departed from the shore, broke his chain, and set out on his long journey to rejoin him. How he traced him must ever be a marvel. Perhaps he pursued the line of coast till he reached London, where it is possible he may have recovered some trace of his lost friend by scent, at the landing place. This, however, is so improbable, that it is more likely he made the discovery by that incomprehensible power which we call instinct.