Copy letter from Theodore E James, to Professor William Dobinson Halliburton, Fellow of the Royal Society, Church Cottage, 17 Marylebone Road, N.W. 'Dear Sir, In reply to your postcard, I enclose herewith the paper by Dr. [John Smyth] Macdonald on "The Demarcation Current of Mammalian Nerve" [not enclosed]. I am, Yours faithfully, T. E. James for the Asst. Sec. R. S. [Assistant Secretary, Royal Society]'. 30 July 1900