Illustration Blocks. Total 46 (49 photo engravings mounted on wood). Each marked in grease pencil on back with Figure No. and author. Some blocks common to both articles. Arranged face down in each portfolio on blotter paper. Use tear sheets as guide to blocks.. William Benbow Thompson Papers, MSS 49-6. UCSF Archives and Special Collections. https://public.ucsf.aspace.cdlib.org/repositories/8/archival_objects/30202 Accessed April 27, 2025.