Copy letter from Robert William Frederick Harrison, to Sir Archibald Geikie, Secretary, Royal Society 'Paper by Dr Walsham and Dally on the "Study of the mechanism of circulation and respiration, with especial reference to the action of the heart & diaphragm". A letter from the Chairman of the Physiology Sectional Committee with reference to the above paper is enclosed, together with Prof. [Professor] Clifford Allbutt's letter of the 5th instant to Sir Archibald Geikie. The manuscript has been retained at the Royal Society'. 9 April 1907