140 ANIMAL INTELLIGENCE 
no light and walked softly, yet two of the puppies, 
lying against the wire-mesh partition, some 6 or 8 
feet from where I stood in the darkness, awoke and 
soon began to cry as I passed close to the closed main 
kennel door. The old dogs were heard sniffing. They 
evidently detected me by the sense of smell. 
Was it wholly so in the case of the puppies, or were 
they assisted by sight? Hearing may, I think, be 
excluded, though not with perfect confidence, so sharp 
now are their ears. 
In any case, this observation is of much significance, 
even be it granted that they were not asleep at the 
time I stood before the door of their kennel. It is 
further to be remembered, in this instance, that by a 
misunderstanding the puppies had not had their last 
evening meal, and also lacked water. 
48th day.—It remains warm. The flies are trouble- 
some, and as the puppies lie asleep, or trying to sleep, 
the same movements of the skin of the head, of the ears, 
etc., may be seen as in mature dogs when flies irritate 
these parts. 
49th day.—To-day, for the first time, the puppies were 
removed for a time to a part of the yard enclosed by 
wire-mesh. The earth furnishes a fresh surface with 
various small objects on it. 
The puppies proceed to investigate, as when before 
they were given free access to new surroundings. 
They seize and carry small objects, which they take 
from each other, indulge in play, and evidently ex- 
perience keen enjoyment. After, say, half an hour, they 
lie down and sleep. 
When I call “ Puppies!” from a verandah, at a height 
of about 20 feet, and at about the same distance on 
their plane, they look up, some of them at least, at once, 
to my surprise, for I expected they would not be able 
to detect the direction of the sound so quickly. 
