People living in what we call a state of nature, like African savages, or as our American Indians once did, seem to follow Heart of Nature's law; 'Kill _only_ what ye need for food.' But many people that are called civilized never think of natural law at all, and having a coarse streak in their natures desire to kill wild things merely for the sake of killing.

It is against such people that laws must be made by those who have more intelligence.
[Illustration: Mourning Dove] "Now for your Dove, Nat--called the Mourning Dove from his mournful 'coo-o-coo-o!'' "At first," said Nat, "when I saw it in the glass case it looked sort of bluish-brown.

But near by it is greenish-brown and gray on top, and its head and neck have bright colors, like what you see on silver that has not been cleaned for some time or the spoon with which you have been eating boiled eggs." "We call those colors metallic tints," interrupted the Doctor, to help Nat out.
"Thank you; that is what I was trying to say.

It is just like what Rap called soap-bubble colors on the Pigeon's neck, but this Dove has got black specks like velvet on the neck too, and a black band on the tail with white tips to the feathers; underneath it is dull purple and sort of buff, and its feet are red, and it's about a foot long." "That is a fairly good description of a bird whose colors it is almost impossible to put into words.

Do you know anything about this Dove, Rap ?" "I only know it builds such a poor nest that you would think the eggs would drop through the bottom, only they don't seem to.