An important set of partbooks now belonging to Peterhouse, Cambridge (Peterhouse MSS 471–474) was probably copied in about 1540, mainly from the repertory of Magdalen College, Oxford, for use at Canterbury Cathedral. The books contain over seventy Latin sacred compositions in five voices, chiefly by English composers of Taverner’s generation; some fifty of these works are not otherwise known. Unfortunately the tenor book and some leaves from the treble book are lost, rendering the unique compositions incomplete. Antico Edition has published in forty volumes (RCM101–140) all the compositions unique to the Peterhouse collection, in editions by Nick Sandon in which the missing voices have been recomposed. An important repertory of high-quality music by composers such as Taverner, Fayrfax, Aston, Ludford, Jones and Pygott is thus made available for practical and scholarly use, throwing fresh light on a crucial period of transition in English musical history. The series has already aroused considerable interest both in Europe and in the United States. In 2018 the Blue Heron vocal ensemble of Boston and its director Scott Metcalfe won the early music category of the Gramophone Classical Music Awards for their fifth CD of music from these partbooks in Nick Sandon's editions. Blue Heron were the first non-European vocal ensemble to receive this accolade, and the reviewer for The Gramophone called this music ‘one of the discoveries of the year’. The first five of the group's Peterhouse CDs are now available as a boxed set entitled The Lost Music of Canterbury.