Among the Percy MSS (Folder 273) in the Harvard College Library is a collection of eighteen leaves of manuscript, of octavo size, loosely laid into board covers with a title on the outside printed in ink, presumably by Percy: “Shenstone's Billets.” This material is all in the handwriting of Shenstone, and consists of lists of songs and ballads from various published collections which he had examined, classified according to merit, with brief comments on individual poems in a few cases, and with longer connected remarks in the manner of letters in which he discussed the general principles that should govern Percy and himself in selecting and arranging the material for the Reliques.