Copy letter from Herbert Rix, to Dr John Venn, Caius College, Cambridge Rix is sending today by instruction of Dr Michael Foster; a short paper by A L Haddon 'On Observations on th Fixed Errors in Drawing', 59 cards illustrating the same, a correspondence of three letters between Mr Haddon and Mr Galton, and a letter from Haddon to Rix dated 28th February. 4 March 1895