12-13), that the ash-tree dell at Stowey, which he had already used for a scene of supernatural terror in "Osorio," bears some part in his avowed dream of Xanadu.
45, 3--*Alph, the sacred river.* This name seems to be of Coleridge's own invention; at least it has not been pointed out where he found it.
16--*demon-lover.* The demon-lover (or more often, with sexes reversed, the fairy mistress) is a favorite theme of romance, taken from folk-lore, where it appears in many forms.Cf.the ballads of "Thomas Rymer," "Tam Lin," and "The Demon Lover," in Child's "English and Scottish Popular Ballads," and Scott's "William and Helen" (a translation of Burger's "Lenore").
46, 39, 41--*Abyssinian maid, Mount Abora.* See introductory note above.
53--*honey-dew.* A sweet sticky substance found on plants, deposited there by the aphis or plant-louse.

It was supposed to be the food of fairies.

Not improbably Coleridge was thinking of manna, a saccharine exudation found upon certain plants in the East.

Mandeville describes it as found in "the Land of Job:" "This Manna is clept Bread of Angels.

And it is a white Thing that is full sweet and right delicious, and more sweet than Honey or Sugar.