“Certainly,” replied his uncle, “unless, of course, the animal has had its tail cut, in which case I will not answer for it.”

“That is plain enough: with the tip of the tail missing the white touch is missing too.”

“I will add that if the dog has only one white spot, that spot will always be on the tip of the tail.”

“That singularity must have a reason?” queried Louis. [[195]]

“Doubtless it has a reason, for nothing is left to chance in this world, not even the tuft of hair at the tip of an animal’s tail. I will tell you, then, that the various wild species akin to the dog, jackals in particular, have, most of them, a white spot on the tip of the tail. It is a sort of family trait which the dog, their ally, perhaps their descendant, is sure to imitate every time it admits any white into its coat. Strange development! If the dog comes, as is supposed, from the jackal, it has lost its primitive savagery, its bad odor, its nocturnal cries, and has faithfully retained from its ancestry only the plume at the end of its tail. I will not undertake to explain why, in a fundamental change of habits, one insignificant detail, a mere nothing, shows greater tenacity and remains.

“To the differences in color are added differences in the quantity and quality of the hair. Most dogs have short, smooth hair; some have fine, curly hair, and look as if clothed in wool. Such is the barbet, also called sheep-dog, because its fur reminds one of the curly fleece of a sheep. Others, like the spaniel, have long and wavy hair, especially on the ears and tail. Finally, there are some wretched, unsightly dogs with the body entirely naked. One would think that some skin disease had bereft them of their last hair. They are called Turkish dogs.

“The size is not less variable. The Newfoundland dog is a majestic animal, as large as a calf; and then you will see a curly lap-dog, good for sleeping on drawing-room cushions, so tiny a creature that it [[196]]could go into its master’s pocket. Between these two extremes there are all degrees.

“If we enter on the details of shape, what diversity, again, do we find! Here the ear is small and stands up in a point; there it is large and covers the whole of the temple, and hangs down low enough to dip into the porringer out of which the animal eats. One, active in the chase, carries its slender body on long legs; another, apt at insinuating itself into the fox’s narrow hole or the rabbit’s burrow, trots on stubby members and almost touches the ground with its stomach. In this one the muzzle is gracefully tapered, made for caresses; in that, it is shortened into a brutal snout, adapted to warfare. Then there are some whose knotty and twisted legs seem crippled from birth; and there are others whose nose, black as coal, has the two nostrils separated by a deep trench.”

“Those dogs look as if they had a double nose,” Louis remarked. “They are said to have a keener scent than the others.”

“I don’t know how far the split nose may indicate keenness of scent. Let us go on and take a rapid glance at the principal breeds of dogs.