Richard Hart, the last prior of Llanthony Secunda, Gloucestershire, was lord of the manor of Brockworth, and the builder of Brockworth Court; he was also the brother of Theyer's grandmother Ann Hart. Theyer inherited Hart's library of manuscripts, which determined his direction as collector. He collected manuscripts from the West Midlands, in particular;Louise Sylvester, Lexis and Texts in Early English: studies presented to Jane Roberts (2001), p. 53; Google Books. he made acquisitions from Worcester and West of England religious houses,Julius Parnell Gilson, The Library of Henry Savile, of Banke, in Transactions of the Bibliographical Society, London vol. 9 (October 1906 – March 1908), p. 136; archive.org. including Buckfast Abbey and Hailes Abbey.Monastic Database page
