[Letter] 1876 Jun 16, Heathfield Park, Hawkhurst [to] Maj. E.R. Festing/John Tyndall, [Informs Festing, Dep. Gen. Supt. of South Kensington Museum, that Dr Gladstone spoke to him re lecturing on Faraday's apparatus "some of it was given to me personally by Faraday himself ... W. Chandler Roberts will not object to letting me take Saturday".]