Manual for Learning Telegraphy, 1884, A2011-010-011, Box: 3, Folder: 1. Scottish Rite Masonic Museum & Library.
Manual for Learning Telegraphy, 1884, A2011-010-011, Box: 3, Folder: 1. Scottish Rite Masonic Museum & Library. https://srmml.libraryhost.com/repositories/2/resources/2514 Accessed January 07, 2026.
