Copy of a circular from Philip Zollman, London, to Mr Coper A Collection of letter writ by the Secretaries of the Royal Society and secondly Dr Cromwell Mortimer's Letters ' Mr Zollman (by order of the Society) to Mr Coper, giving thanks for his last letter, promising to encourage mutual Correspondence : and apprizing him of Dr Mortimer's succeeding Dr Rutty. ' 7 August 1731