This text represents a sort of customary or ordinal for the English court chapel in 1449, intended to govern the life of the 49 people, including choirboys, who were the staff of this peripatetic establishment. It was based on earlier drafts, and was sent to Alvaro Vaz d'Almada, a knight of the Garter, for the use of Afonso V of Portugal; it includes a copy of the English coronation rites.

Notes by: D.H. Turner