Catalogue of Boley Precision Lathes Models 1A, 1B, 1AM, 1BM, 1AH, 1BH, 2A, 2B, 3B, 3C, 4B, 4C, 3CR, 4BR, 2BJ, 3BJ, 4BJ, 3L, 4L, 2H, 3H, 4H, 3HK, 3HL, 3HM, 2HN, 2HK, 3HK, 4HK, 2HL, 3HL, 4HL, 2HM, 3HM, 4HM, PA, PS, PP, PQ, Type G and Accessories and Drive Systems. Catalogue No. 271 showing lathes as made from the 1920s to the 1930s. 34 pages

Herbert No. 4, 4B and 4C Capstan Lathes: Operator's Instruction Manual. Includes 2 editions, early and late, covering all models.

HERBERT 4, 4B and 4BS Capstan Lathes: Parts Manual as Exploded Component Drawings (the Parts Manual for the Model 4 was changed from simple photographic plates to a fully drawn, absolutely clear exploded-component edition in the 1960s).