Traveling Masonic certificate issued to Horace Bradstreet Plumer from Joseph Warren Lodge, 1911 October 30, A1987-024-001, Box: 1, Folder: 1. Scottish Rite Masonic Museum & Library.
Traveling Masonic certificate issued to Horace Bradstreet Plumer from Joseph Warren Lodge, 1911 October 30, A1987-024-001, Box: 1, Folder: 1. Scottish Rite Masonic Museum & Library. https://srmml.libraryhost.com/repositories/2/resources/2155 Accessed November 12, 2025.
