The ground of this popular practice might be the common opinion concerning the vertue prognostick of these Birds; as also the natural regard they have unto the winds, and they unto them again; more especially remarkable in the time of their nidulation, and bringing forth their young. For at that time, which happeneth about the brumal Solstice, it hath been observed even unto a proverb, that the Sea is calm, and the winds do cease, till the young ones are excluded; and forsake their nest which floateth upon the Sea, and by the roughness of winds might otherwise be overwhelmed. But how far hereby to magnifie their prediction we have no certain rule; for whether out of any particular prenotion they chuse to sit at this time, or whether it be thus contrived by concurrence of causes and providence of Nature, securing every species in their production, is not yet determined. Surely many things fall out by the design of the general motor, and undreamt of contrivance of Nature, which are not imputable unto the intention or knowledge of the particular Actor. So though the seminality of Ivy be almost in every earth, yet that it ariseth and groweth not, but where it may be supported; we cannot ascribe the same unto the distinction of the seed, or conceive any science therein which suspends and conditionates its eruption. So if, as _Pliny_ and _Plutarch_ report, the Crocodiles of _Ægypt_ so aptly lay their Eggs, that the Natives thereby are able to know how high the floud will attain; it will be hard to make out, how they should divine the extent of the inundation depending on causes so many miles remote; that is, the measure of showers in _Æthiopia_; and whereof, as _Athanasius_ in the life of _Anthony_ delivers, the Devil himself upon demand could make no clear prediction. So are there likewise many things in Nature, which are the fore runners or signs of future effects, whereto they neither concur in causality or prenotion, but are secretly ordered by the providence of causes, and concurrence of actions collateral to their signations. It was also a custome of old to keep these Birds in chests, upon opinion that they prevented Moths; whether it were not first hanged up in Rooms to such effects, is not beyond all doubt. Or whether we mistake not the posture of suspension, hanging it by the bill, whereas we should do it by the back; that by the bill it might point out the quarters of the wind; for so hath _Kircherus_ described the Orbis and the Sea Swallow. But the eldest custome of hanging up these birds was founded upon a tradition that they would renew their feathers every year as though they were alive: In expectation whereof four hundred years ago _Albertus Magnus_ was deceived. * * * * * Printed by T. and A. CONSTABLE, Printers to His Majesty at the Edinburgh University Press Transcriber's End Notes