Wireless Telegraphy. Secrecy as to contents of Radiotelegrams. Britain: n.d. ca early-to-mid 20th century. 7 1/2 x 9 1/2 in. (toning, light soil, loss at upper right corner). Mounted with adhesive on lined paper of matching size and mounted again on larger paper.

Small broadside announcing British regulations related to "The Post Office (Protection) Act of 1884 (Section II)."  Refers to the necessity of maintaining secrecy of contents of telegrams and consequences for persons who engage in the fraudulent alteration or issue of telegrams, and/or discussion of contents. Scarce, with copies located in the Marconi Collection at the Museum of History of Science, University of Oxford, which documents the works of Guglielmo Marconi and the wireless telegraph corporation he founded, as well as in the Porthcurno Museum of Global Communications in Cornwall, England.

[With:] "Post Office Telegraphs / Acts of Parliament / From July 1863 / to August 1878 / & / Subsequently." Custom bound folio of manuscript notes and printed telegraph acts with additional related papers laid-in identified to "Mr. MacGregor." Leather bound soft boards and embossed gold title. Approx. 8 1/2 x 13 in. (heavy wear and adhesive remnant on cover, heavy wear to spine, enclosed papers with various conditions but generally fair to good). Folio includes copies of telegraph regulations including "An Act to regulate the Exercise  of Powers under Special Acts for the Construction and Maintenance of Telegraphs" [1863]; "Submarine Telegraph Act, 1885"; "Regulations as to Foreign Telegrams"; "Statutory Rules and Orders, 1898,"; "Post Office and Telegraph Act, 1920" and more.