The Early English Church Music Committee of the British Academy plans a series of volumes devoted to the music of the fifteenth century, to be supervised by a separate sub-committee. While not constituting a publication list as such, the present enterprise has been commissioned to facilitate the speedier publication of this repertory. Hence, its purpose is to assemble as full as possible a catalogue of the surviving liturgical music that is now thought to be (or has, with varying degrees of certainty, been thought to be) English or to have been written in England. Accordingly, it draws on the work of a considerable number of scholars. The compilers wish to acknowledge the contributions generously made by other members of the EECM fifteenth-century sub-committee, and they also extend a fervent invitation to others to contribute further.