Letter from W H [William Herrick] Macaulay, King's College, Cambridge, to [Joseph] Larmor He sends the article [for the supplement of the Encyclopaedia Britannica] thinking that the commission was a vague one. It did not occur to him that he had not received all of the instructions. His aim was to give a self-contained acoount of the subject assuming no previous knowledge in the reader. He has not referred to other articles on the subject. He asks Larmor to criticise the piece freely. 24 April 1901