Letter from John Canton to Dr Birch at the Royal Society; letter from William Mountaine to John Canton Letter dated 20 December 1763 Written from Spittal Square by John Canton to Rev. Dr Birch at the Royal Society. Marked 'A Copy of a Letter'. Later withdrawn. Letter dated 11 April 1763 Written at Gainsford Street Southwark from William Mountaine FRS 'The Papers last week made your self and me Legatees int he Will of the Reverend Mr Miles decd. - a line of advice from you, whether there be any degree of truth in theat paragraph will much oblkige' 1763