After 1889 it was rare for a year to pass without my visiting Paris both in spring and summer, and seeing a great deal of Metchnikoff and his friends Roux, Duclaux, Laveran, and the great master of the Pastorians, who died in 1895. Metchnikoff took me to his home and cemented his friendship with me by bringing to me that of his gifted and devoted wife. Madame Metchnikoff had when a schoolgirl studied zoology under her future husband at Odessa, and now was able to give serious help in some of his researches. She published some experimental investigation on the sterilisation of the alimentary canal of tadpoles and some other researches, and having a thorough knowledge of English, which Elie did not possess, she helped him in reading and translating from that language. But her chief talents were in the arts of painting and sculpture, and when they purchased their country house at Sèvres, she built a studio in the garden in which to pursue her vocation. Metchnikoff on several occasions came to England to take part in "congresses" or to give special addresses, and often stayed a day or two with me in London.[1] I was with him at the Darwin Celebration at Cambridge in 1909, and the last occasion when he came was to give the Priestley Lecture of the National Health Society in November 1912. At my request he selected "The Warfare against Tuberculosis" as his subject, and gave a most valuable account of the history and actual condition of that enterprise, relating the important results of his expedition to the Kalmuk Tartars for the purpose of studying the immunity from and the liability to infection by tuberculosis among that nomad population. The lecture was delivered in French, and I made a translation of it which appeared with numerous illustrations in the journal called _Bedrock_, published by Constable & Co. I mention that publication here as it is the only one excepting the three lectures on "The New Hygiene" (Heinemann, London, 1906) originally published in an English form by Metchnikoff, and deserves more attention from the English medical public than it has received. [1] He received an honorary degree at Cambridge in 1891, and also attended the International Medical Congress in London in that year. In 1901 he gave a lecture at Manchester on the intestinal flora. In 1906 he gave a course of three lectures in London on "The New Hygiene." I translated them for him, and they were published as a little volume by Heinemann.