[Papers of the firm of Marks and Clerk re patents. 1875-1944. Comprise vols. (36, from before 1896 to 1925) of reports on patent actions and other matters by Dugald Clerk (and also by Marks & Clerk and M. Atkinson Adam between 1901 and 1909); vols. (10, 1910 to 1944) of reports on searches and cases for opinion of counsel by Marks & Clerk; vols. (3, 1910 to 1912) of reports on patent actions and other matters by M. Atkinson Adam - all ts. carbon copies. Also miscellaneous papers (2 boxes of notebooks, letters patent, patent specifications, photographs, drawings and trade literature) relating mainly to Clerk's work on gas engines; boxes (2) of c.100 lantern slides; films (3 reels, 16mm) re an application by E. & L. Dreyer to revoke patent 91258, 'Improvements in or relating to devices for spreading granular or powdery material']