Copy letter from Robert William Frederick Harrison, to Sir William Niven, Fellow of the Royal Society Harrison states that 'Mathematical concepts of the material world' by Mr Whitehead is estimated to form 65 pages of Philosophical Transactions of the Royal Society and to cost around £36. He encloses the referees' remarks, and asks that if Niven agrees with Professor Larmor, that the paper should go to press, that he mark the sections of the referees' reports that should be sent for the author's consideration. 14 December 1905