Copy letter, from Sir John Herschel to Matthew Fontaine Maury, dated at Collingwood Copy of a letter, copied as part of the correspondence project led by Colonel John Herschel FRS following the death of his father. Acknowledges the proof sheets of the new edition of the Physical Geography of the Sea. Will read them with the attention they deserve. Does not at present agree with the theories of Matthew Maury. 31 July 1859