The volume comprises 285 vellum pages of writing and illustrations, with daily services in medieval Latin and 19 miniatures.
[2] Two things may back this up: 1) the insertion at the end, out of order, of the office of St Helen; 2) Revd.
Enraght's suggestion of a terminus ante quem of 1443, owing to the lack of a feast of St Raphael, which was instituted in that year.
Recent research has shown that it was not uncommon for churches to invest in liturgical music books by the later fifteenth century.
It fell into private hands, including, in the 1850s, those of Henry Huth, and eventually re-surfaced at auction in 1912, where it was bought and returned to St Helen's Church.