A hand book for the Installation, Running and Maintenance of Rolls-Royce Kestrel Aero Engines series IV-XII published 1937 (some scuffing to cover); AVRO instruction book for the AVRO Trainer Type 621 with notes on rigging, maintenance and repair, 1st ed, published 1931; AVRO instruction book dealing with the military equipment of the AVRO 626 and 637 aircraft (soft cover) published May 1934 and an operations handbook for AVRO Lancastrian aircraft (soft covers), published April 1945 (4)