Complemented by Professor Strohm’s facsimile edition of the entire source by the University of Chicago Press, the publication of eight Mass settings from the Lucca Choirbook is a signal contribution to our understanding of the dissemination of English music in fifteenth-century Europe. Only two are ascribed, to Walter Frye and Henricus Tik, but the insular provenance of the music is confirmed on grounds of style, repertoire and performance procedure. None of the Masses is preserved complete, but...