Copy letter from Robert William Frederick Harrison, to Dr Henry Head, Fellow of the Royal Society 'Dear Dr Head, A meeting of the Physiology Sectional Committee is being summoned for Thursday next, June 6th, at 3 ^15^ o'clock; and it would be a great convenience to the Committee if you could send in your report on Dr G. J. [George James] Burch's paper on Colour Blindness in time for consideration on that day. I am, very truly yours, Robt [Robert] Harrison Asst. [Assistant] Secretary R.S. [Royal Society]'. 3 June 1907