Copy letter from Robert William Frederick Harrison to Lieutenant-Colonel W B Leishman RAMC, Royal Army Medical College, Millbank, SW 'Dear Sir, Soiree. Referring to your letter of April 6th, we should be glad if instead of the Kala Azar parasite, you would exhibit in connection with recent work on transmission of "Tick-fever". There is no immediate hurry for the return of the form.' 7 April 1909