Copy letter from Robert William Frederick Harrison, to Messrs Pryor & Harvey, 3 St Nicholas' Building, Newcastle-onTyne In reply to the Messrs letter of the 7th, Harrison has had a search made but finds no record of any description of Professor Ferraris's discoveries on 'Three Phase Currents' having been published by the Royal Society, neither does he find any record of correspondence with Ferraris during 1888. Provides details of a publication by Ferraris in Italian in the Turin Academy's 'Atti'. If the Messrs do not have access to this publication Harrison could have a translation made but it would be rather expensive, probably about £5. 13 December 1897