Collection of Letters to Dr. John Percy F.R.S. from Individual Donors Etc. of Specimens to what Became the Percy Collection of Metallurgy, Now in the Science Museum
A collection of Newspaper Cuttings, Manuscript Letters, etc., relating to the alleged existence of Gold in England: formed by Dr. John Percy
A Collection of Newspaper Cuttings, Manuscript Letters, Etc., Relating to the Alleged Existence of Gold in England: Formed by Dr. John Percy