Copy letter from Robert William Frederick Harrison, to W R Cooper, 82 Victoria Street, S.W. Acknowledges their letter enclosing fifteen cheques of one guinea each, received from members of the Physical Society as subscriptions for the 'Proceedings [of the Royal Society]'. A cheque from Professor Callendar was not entered on their list, also no cheque was sent in for R Ll Jones. Two cheques by Drysdale and Willows will need their endorsement. 3 March 1910