[Letter] 1883 Apr 14, 23 Delahay Street, Westminster [to] Dr. Turner, 13 York Chambers, Adelphi / Sir John Wolfe-Barry. [Mentions 'the removal of carbonic acid gas & sulphurated hydrogen from the District Line' and the difficulties caused by 'the force of the induced currents due to the passage of trains'. 3p. ms.] Letter 1883 Apr 14