ic camera,
and quite beyond the reach of normal human organs. He had, further,
observed that while dogs were usually terrified in the presence of such
phenomena, cats on the other hand were soothed and satisfied. They
welcomed manifestations as something belonging peculiarly to their own
region.

He selected his animals, therefore, with wisdom so that they might
afford a differing test, each in its own way, and that one should not
merely communicate its own excitement to the other. He took a dog and a
cat.

The cat he chose, now full grown, had lived with him since kittenhood, a
kittenhood of perplexing sweetness and audacious mischief. Wayward it
was and fanciful, ever playing its own mysterious games in the corners
of the room, jumping at invisible nothings, leaping sideways into the
air and falling with tiny mocassined feet on to another part of the
carpet, yet with an air of dignified earnestness which showed that the
performance was necessary to its own well-being, and not done merely to
impress a stupid human audience. In the middle of elaborate washing it
would look up, startled, as though to stare at the approach of some
Invisible, cocking its little head sideways and putting out a velvet pad
to inspect cautiously. Then it would get absent-minded, and stare with
equal intentness in another direction (just to confuse the onlookers),
and suddenly go on furiously washing its body again, but in quite a new
place. Except for a white patch on its breast it was coal black. And its
name was--Smoke.

"Smoke" described its temperament as well as its appearance. Its
movements, its individuality, its posing as a little furry mass of
concealed mysteries, its elfin-like elusiveness, all combined to justify
its name; and a subtle painter might have pictured it as a wisp of
floating smoke, the fire below betraying itself at two points only--the
glowing eyes.

All its forces ran to intelligence--secret intelligence, wordless,
incalculable intuition of the Cat. It was, indeed, _the_ cat for the
business in hand.

The selection of the dog was not so simple, for the doctor owned many;
but after much deliberation he chose a collie, called Flame from his
yellow coat. True, it was a trifle old, and stiff in the joints, and
even beginning to grow deaf, but, on the other hand, it was a very
particular friend of Smoke's, and had fathered it from kittenhood
upwards so that a subtle understanding existed between them. It was this
t