1930s British Isles Motoring Encyclopedia

Part 4 cover of a 1930s British Isles Motoring Encyclopedia part-work. Finally published in 34 parts from 1932 to 1934, this comes as an A to Z touring guide, complete map of the British Isles, with everything related to automobiles and motoring of the time. Included are illustrations of long forgotten makes and marques of cars and motorcycles with some covered by maintenance requirements, much as the modern Haynes style manuals. I am missing parts 1-3, but have all from 4 to 34.