In olden times there appears to have been a notion that in some cases plants could not be germinated excepting through the direct intervention of birds. Thus Bacon tells us of a tradition, current in his day, that a bird, called a Missel-bird, fed upon a seed which, being unable to digest, she evacuated whole; and that this seed, falling upon boughs of trees, put forth the Mistletoe. A similar story is told by Tavernier of the Nutmeg. “It is observable,” he says, “that the Nutmeg-tree is never planted: this has been attested to me by several persons who have resided many years in the islands of Bonda. I have been assured that when the nuts are ripe, there come certain birds from the islands that lie towards the South, who swallow them down whole, and evacuate them whole likewise, without ever having digested them. These nuts being then covered with a viscous and glutinous matter, when they fall on the ground, take root, vegetate, and produce a tree, which would not grow from them if they were planted like other trees.” The Druids, dwelling as they did in groves and forests, frequented by birds and animals, were adepts at interpreting the meaning of their actions and sounds. A knowledge of the language of the bird and animal kingdoms was deemed by them a marvellous gift, which was only to be imparted to the priestess who should be fortunate enough to tread under foot the mystic _Selago_, or Golden Herb. At a time when men had no almanack to warn them of the changing of the seasons, no calendar to guide them in the planting of their fields and gardens, the arrival and departure of birds helped to direct them in the cultivation of plants. So we find Ecclesiastes preached “a bird of the air shall carry the voice,” and in modern times the popular saying arose of “a little bird has told me.” This notion of the birds imparting knowledge is prettily rendered by Hans Christian Andersen, in his story of the Fir-tree, where the sapling wonders what is done with the trees taken out of the wood at Christmas time. “Ah, we know--we know,” twittered the Sparrows; “for we have looked in at the windows in yonder town.” Dr. Solander tells us that the peasants of Upland remark that “When you see the Wheatear you may sow your grain,” for in this country there is seldom any severe frost after the Wheatear appears; and the shepherds of Salisbury Plain say:-- “When Dotterel do first appear, It shows that frost is very near; But when the Dotterel do go, Then you may look for heavy snow.”