Copy letter from [Robert William Frederick Harrison], to Professor G H Darwin, Fellow of the Royal Society 'The Assistant Secretary will be much obliged to Professor Darwin if he will give him his advice as to whether Professor Maurice Levy's "Lecons sur la Theorie des Marees", the first part of which has been offered [illegible] by the booksellers, is a work which ought to be purchased for the Royal Society Library'. 24 January 1899