William Henry Walenn (7 January 1828 – 20 September 1896) was born in London and was trained as an engineer at the works of Messrs. Cottam, and received part of his education at University College, London, where he studied mathematics under Augustus De Morgan.
[1] In 1871, he contributed a paper to the Philosophical Magazine, "On Solutions for Depositing Copper and Brass by means of Electric Force", and about the same time he conducted some experiments for the Government in electro-deposition of copper upon the bottom of an iron ship.
[2] Between 1868 and 1880, several mathematical papers of Walenn's, on "Unitates" and methods of checking calculations by means of these, were published in the Phil.
He died at his residence, 9 Carleton Road, Tufnell Park, on 20 September 1896, after a long illness.
Of them, Arthur, Herbert, Gerald and Dorothea formed the Walenn String Quartet in the 1890s.