Copy letter from Robert William Frederick Harrison to Mr J Walter, The Library, Westcombe Park, Blackheath, SE 'Dear Sir, With reference to your letter of May 8th, we have no copies of the Philosophical Transactions for 1782 and 1790 on sale. You would no doubt be able to consult these volumes in the Patent Office Library, Southampton Buildings, Chancery Lane, WC. This Library is open to the public and every facility is given to readers and students.' 16 May 1908