112 THE ESSEX NATURALIST. 1921. "AEneas MacIntyre : a forgotten Essex Botanist." 1924. "The Common Polypody in Essex : Why is it Decreasing ?" 1927. "Essex Rivers and their Names." In 1890 Christy wrote a Special Memoir for the Club on "The Birds of Essex," which still remains the chief authority on the subject ; and in 1910 his and Miss Thresh's exhaustive account (referred to above) on the History of Mineral Waters of Essex was republished, with additions, as another Special Memoir of the Club. Miller Christy (the "Robert" was early dropped, except among members of his family) served as President of the Club from 1905 to 1907, and again in 1910 (during the then President's illness) as Acting-President, since when he has been one of its permanent Vice-Presidents. He was a most frequent attendant at the Club's meetings, both at the indoor and the field meetings, and he offered hospitality to the members at his home at Chignal St. James, near Chelmsford, on many occasions; and the Club's Museum owes many interesting specimens to his generosity. From 1917 to 1919 he edited the Essex Naturalist. In 1889 he was elected a Fellow of the Linnean Society, For many years he was a member of Council of the Essex Archaeological Society, and he was a prominent member of the now defunct Morant Club, which he helped to found in 1910. To older members of our own Club the figure of Miller Christy is so familiar, and his name is so closely bound up with the Club, that it is indeed hard to realise that the forty-eight-year long association is broken. In many respects "We ne'er shall look upon his like again." P.T. ORIGINAL NOTES. LEA VALLEY DEPOSITS. A series of trial holes across the lower Lea Valley between Hackney Wick and Leyton, made in September and October, 1925, by the Engineer to the Leyton U.D. Council, preparatory to excavations for a new main outfall sewer from Leyton to connect with the London County Council sewer, gave the following sections through the alluvium and valley deposits :—-