Copy letter from Robert William Frederick Harrison to Horace T [Tabberer] Brown FRS 'I shall be glad if you would let me know by enclosed post card whether you would be able to report upon two papers communicated to the Society by Prof H E Armstrong, the titles of them are as follows:- "Herbage Studies. II. Variation in lotus corniculatus and trifolium repens (Cyanophoric plants)" - By PRof H E Armstrong, E F Armstrong, & E Horton. "Studies on enzyme action. XIX. Urease: a selective enzyme. II Observations on accelerative and inhibitive agents". By Prof H E Armstrong, M S Benjamin, and E Horton. If you can , these will be sent off to you at once they are not very long.' 14 January 1912