The notebook contains handwritten lists of H E S Simmons postcards, photos from the Ratcliffe collection and drawings by Karl S Wood. These are presumably lists of the material collected by T J Mason. The handwritten list of Simmons cards contains gaps, but a complete typescript list of the watermill cards, perhaps by Simmons himself, has been pasted over the handwritten list.
T J Mason's collection passed to Martin Mason, and was then sold; letter 46 in FWGC/1106833 from Stephen Buckland to Frank Gregory describes the sale of the Martin Mason collection, referring to a large amount of Simmons postcards, presumably those listed in this book. Frank Gregory's collection when catalogued at the Mills Archive was found to contain many Simmons postcards, now in the Simmons Collection (HESS). It also contained the Karl Wood drawings listed in this book, now catalogued as the Karl Wood Collection (WOOD); notes in T J Mason's hand were found with them.