Report on the manuscripts of the Earl of Ancaster, preserved at Grimsthorpe
Great Britain. Royal Commission on Historical Manuscripts; Willoughby de Eresby, Peregrine Bertie, 11th baron, 1555-1601; Ancaster, Gilbert Henry Heathcote-Drummond-Willoughby, 1st earl of, 1830-1910; Lomas, S. C. (Sophia Crawford), d. 1929