LIUTERIA ITALIANA DELL'OTTOCENTO E DEL NOVECENTO by Umberto Azzolino, 1964, Dictionary of Italian makers and instruments from the 18th and 19th century
FRENCH POLISHING by Philippa Barstow and Alan Waterhouse, 1993, isbn 0-7134-7077-1
RENAISSANCE IN ITALY by John Addigton Symonds, 1911, Part iii The Fine Arts
VIOLIN MAKING AND REPAIRING by Robert Alton, 1927, First published 1923, with a R.G. Hargrave stamp
THE BOWED STRING by Norman C Pickering, 1991, Observations on the Design, Manufacture, Testing, and Performance of Strings for Violins, Violas and Cellos, With inscription and a letter by the author to Roger Hargrave, soft bound
ITINERARI NEL MONDO DELLA LIUTERIA CREMONESE by Lidia Azzolini, 1987, isbn 887929136X, with a sticker from Roger Hargrave, soft bound
CATALOGUE OF WEICHOLD VIOLIN SUPPLIERS PRE 1935
Letter: Roger Graham Hargrave (photocopy) (Jul 2 2025) Photocopy of letter by R. G. Hargrave dated July 2 2025