British physicist and writer (1851–1940) who held patents for key radio technologies and identified electromagnetic radiation independent of Hertz's proof. ALS, one page, 6.75 x 9, Mariemont letterhead, August 9, 1915. Handwritten letter to Mrs. Burdon-Muller, in full: "I am delighted to send you a few copies of Mr. Marshall Wood's Hymn. He wants to get it better known, and sent me these copies. You will find his address in the paper. For the Wedding itself we had it printed with other hymns on a small sheet, but I have no copies of that left." In fine condition, with a central vertical fold.
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