Dated 1860, 1960. From Working papers, experimental notes and correspondence relating to the development of the electric telegraph, [1836-1960].

Correspondence between Charles [Carl] Ruland [1834-1907], Librarian, Windsor Castle, on behalf of Albert (1819-1861), Prince Consort, and Charles Wheatstone, describing Prince Albert's suggestion that enclosed columns of water might act as a conducting medium for underwater electric telegraph communications in preference to submarine cables, 1860. Correspondence between Dr Edward James Burge, Department of Physics, King's College London, and the librarian of Windsor Castle, relating to Prince Albert's proposal, 1960. With copies and photographic negatives of the original letter.