[Collection of letters, 1840-1888, to Dr. John Percy F.R.S. from individual donors etc of specimens to what became the Science Museum's Percy collection of metallurgy. Each letter, or group of letters, bears a number which relates to the numbers in the 'Catalogue of the collection of metallurgical specimens formed by the late Dr. Percy, F.R.S.' (1892) by Prof. J.F. Blake, a copy of which is kept with the letters. Slips accompanying some of the letters are very often later notes written by Percy clarifying the specimens' provenance. Many items also bear similar notes by Percy, but are not always mentioned in the listing which is available of the letters. 1 box, plus 1 box of miscellaneous] Collection of letters, 1840-1888, to Dr. John Percy 1840-1888