How old this tradition is, we do not know; but we do know that swallows of one kind and another were welcomed in the Old World in the old days to heathen temples before there were Christian churches, and that to-day in the New World they play in and out of the dark arches in the great churches of far Brazil and flash across the gilding of the very tabernacle, reminding us of the passage in the Psalms where it is written that the swallow hath found a nest for herself, where she may lay her young—even thine altars, O Lord of Hosts!
So it is not strange that far and wide over the world people have the idea that swallows bring luck to the house. I think so myself, don't you?—that it is very good fortune, indeed, to have these birds of friendly and confiding ways beneath our shelter.
Of course the ancestors of cliff swallows had not known the walls and roofs of man so long as other kinds of swallows; but the associations of one short century had been pleasant enough to call forth many cheerful squeakings of joy, just like those of Eve and Petro that pleasant day in June when they started their nest under the roof near the top of the ladder.
To be sure, they made no use of that ladder, even though they were masons and had their hods of plaster to carry way up near the top of their cliff. No, they needed no firmer ladder than the air, and their long wings were strong enough to climb it with.
They lost little time in beginning, each coming with his first hod of plaster. How? Balanced on their heads as some people carry burdens? No. On their backs, then? No. In their claws? Oh, no, their feet were far too feeble for bearing loads. Do you remember what Corbie used for a berry-pail when he went out to pick fruit? Why, of course! the hod of the swallow mason is none other than his mouth, and it holds as much as half a thimbleful.
First, Eve had to mark the place where the curved edge of the nest would be; and how could she mark it without any chalk, and how could she make a curve without any compasses? Well, she clung to the straight wall with her little feet, which she kept nearly in one place, and, swinging her body about, hitch by hitch, she struck out her curve with her beak and marked it with little dabs of plaster. Then she and Petro could tell where to build and, taking turns, first one and then the other, they began to lay the wall of their home.
It was slow work, for it must be thick and strong, and the place where they gathered the plaster was not handy by, and it took a great great many trips, their hods being so small.
At first, while the nest was shallow, only one could work at a time; and if Petro came back with his plaster before Eve had patted the last of hers into place, she would squeak at him in a fidgety though not fretful voice, as if saying, "Now, don't get in my way and bother me, dear." So he would have to fly about while he waited for her to go. The minute she was ready to be off, he would be slipping into her place; and this time she would give him a cosy little squeak of welcome, and he would reply, with his mouth full of plaster, in a quick and friendly way, as if he meant, "I'll build while you fetch more plaster, and we'd both better hurry, don't you think?"
After worrying a bit about the best place to dump his hodful, he went to work. He opened his beak and, in the most matter-of-fact way, pushed out his lump of plaster with his tongue, on top of the nest wall. Then he braced his body firmly in the nest and began to use his trowel, which was his upper beak, pushing the fresh lump all smooth on the inside of the nest.
Have you ever seen a dog poke with the top of his nose, until he got the dirt heaped over a bone which he had buried? Well, that's much the way Petro bunted his plaster smooth—rooted it into place with the top of his closed beak. He got his face dirty doing it, too, even the pretty pale feather crescent moon on his forehead. But that didn't matter. Trowels, if they do useful work, have to get dirty doing it, and Petro didn't stop because of that. If he had, his nest would have been as rough on the inside as it was outside, where a humpy little lump showed for each mouthful of plaster.