“The earliest notice of the common Ruby-throat that I have been able to find,” Mr. Ridgway continues, “is an extract from a letter written from Boston in New England, October 26, 1670, by John Winthrop, Esq., governor of Connecticut, to Francis Willoughby, Esq., and published in the philosophical Transactions.” This letter reads as follows: “I send you withal, a little Box, with a Curiosity in it, which perhaps will be counted a trifle, yet ’tis rarely to be met with, even here. It is the curiously contrived nest of the Humming-Bird, so called from the humming noise it maketh as it flies. ’Tis an exceeding little Bird, and only seen in Summer, and mostly in gardens, flying from flower, sucking Honey out of the flowers as the Bee doth; as it flieth not lighting on the flower, but hovering over it, sucking with its long Bill a sweet substance. There are in the same Nest two of that Bird’s eggs. Whether they used to have more at once I know not. I never saw but one of these Nests before, and that was sent over formerly with some other Rarities, but the vessel miscarrying, you received them not.” Of the long bill with which it sucketh the sweet substance, the tongue is the essential feature, so far as sustenance is concerned; consisting of a long double cylinder, “like a double-barreled gun,” Goodrich thought—a most convenient instrument for imbibing nectar—flattened and sometimes barbed at the end, for the capture of the minute insects that constitute the less æsthetic portion of their nutriment—for it has been many times demonstrated that, airy and fairy as they are (the size of the stomach not exceeding the globe of the eye, and scarcely a sixth part as large as the heart, which, in turn, is remarkably large, nearly the size of the cranium), they cannot live by ambrosia alone, nor yet by love, but must vary both with an occasional relish of aphides and infinitesimal spiders. Of “that Bird’s two eggs,” Mr. Chapman says: “As far as known, all hummingbirds lay two white eggs—frail, pearly ellipses—that after ten days’ incubation develop into a tangle of dark limbs and bodies, which no one could think of calling birds, much less winged gems.” It has been a matter of doubt to many whether hummingbirds ever rested at all or spent their lives in the air exclusively, but Mr. Gould states authoritatively: “Although many short intermissions of rest are taken during the day, the bird may be said to live in the air—an element in which it performs every kind of evolution with the utmost ease, frequently rising perpendicularly, flying backwards, pirouetting or dancing off, as it were.” It was the belief of the Duke of Argyle that no bird could fly backward, a theory that he stated with emphasis in his Reign of Law, but it has been proved that he reckoned without “the winglet of the fairy hummingbird,” which seems to be the exception to prove a reigning law of Nature. Montgomery makes of the whole Trochilidæ family this inspired explanation: