A collection of Rolls-Royce brochures; Rolls-Royce Aero Engines, May 1935 describing the Kestrel with numerous photographs, a performance table and a fold out diagram of the lubrication system, Rolls-Royce Aero Engines, Kestrel VI specification for the Kestrel IV, V and VI engines printed on linen, stamped 'Rolls-Royce Ltd Jul 2 1934 Derby' (punched with holes for a ring binder), Rolls-Royce Aero Engines specifications for the Kestrel and Buzzard engines with numerous photographs and a fold out diagram of the lubrication system text in English, French and Spanish; The Advantages and Future of the water-cooled Engine, illustrated with a diagram of the Kestrel, dated 1933, (punched with holes punched for a ring binder), Rolls- Royce Aero Engines, a leaflet in English and French covering the Kestrel and Buzzard engines; A letter dated 20 Jul 34 from Rolls- Royce to Air Speed limited covering a typscript specification for the Kestrel and Goshawk dated 1934, 35 & 36 (10)