The result is a treasure trove of information about musical culture in early modern England. From inscriptions and marks of ownership Greer has been able to re-assemble early sets of partbooks, as well as collections of books once bound together. The search has also turned up new music. At a time when paper was expensive, new pieces were copied into blank spaces in printed books. In these jottings we find a 'hidden repertory' of music, some of it otherwise undiscovered music by known composers. In other cases, we see owners altering the words of songs, to suit new and personal purposes: a love-song in praise of Daphne becomes a heartfelt song to 'my Jesus'; and 'Faire Leonilla' becomes Ophelia (perhaps the first mention of this character in Hamlet outside the play itself). On a more practical level, the users of the music sometimes made corrections to printing errors, and there are indications that some of these were last-minute corrections made in the printing-house (a useful guide for the modern editor). The temptation to 'scribble in books' was as irresistible to some Elizabethans as it is to some of us today. In doing so they left us clues to their identity, how they kept their music, how they used it, and the multifarious ways in which it played a part in their lives.