Letter from [Henry George Percy, Duke of] Northumberland, 2 Grosvenor Place, to Sir Joseph [Larmor] He thanks Larmor for his letter, appreciating that Larmor will bring up the subject of Louping Ill [a tick-borne disease] before Council of the Royal Society. He explains his own difficulty in attending, as he is engaged on a Private Bill Committee. 10 May 1911