V
EVE AND PETRO
If swallows studied history, 1920 would have been an important date for Eve and Petro. It was the one hundredth anniversary of the year when a man named Long visited cliff swallows among the Rocky Mountains.
The century between 1820 and 1920 had given what we call civilization a chance to make many changes in the wild world of birds. During that time lifeless hummingbirds had been made to perch upon the hats of fashionable women; herring gulls had been robbed of their eggs and killed for their feathers; shooting movements had been organized to kill crows with shotgun or rifle, in order that more gunpowder might be sold; the people of Alaska had been permitted to kill more than eight thousand eagles in the last great breeding-place left to our National Emblem; uncounted millions of Passenger Pigeons had been slaughtered, and these wonderful birds done away with forever; and the methods by which egrets had been murdered were too horrible to write about in books for children to read.
But however shamefully civilization had treated, and had brought up children to treat, these and many other of their fellow creatures of the world, who had a right to the life that had been given them as surely as it had been given to men, the years since 1820 had been happy ones for the ancestors of Eve and Petro.
Eve and Petro, themselves, were happy as any two swallows need be that spring of 1920, when they started forth to seek a cliff, just as their ancestors had done for the hundred years or so since man began to notice their habits, and no man knows for how many hundreds of years before that.
Of course they found it as all cliff swallows must, for cliff-hunting is a part of their springtime work. It was very high and very straight. Its wall was of boards, and the gray shingled roof jutted out overhead just as if inviting Eve and Petro to its shelter.
It was a good cliff, and mankind had been so busy building the same sort all across the country for the past hundred years that there was no lack of them anywhere, and swallows could now choose the ones that pleased them best. Yes, civilization had been kind to them and had made more cliffs than Nature had built for them; though perhaps it was Mother Nature, herself, who taught the birds that these structures men called barns and used inside for hay or cattle were, after all, only cliffs outside, and that people were harmless creatures who would not hurt the swallow kind.
However all that may be, it is quite certain that Eve and Petro squeaked pleasantly for joy when they chose their building site, undisturbed by the ladder that was soon put near, and unafraid of the people who climbed up to watch them at their work. They were too happily busy to worry, and besides, there is a tradition that men folk and swallow folk are friendly, each to the other.