282 NOTES ON ESSEX GEOLOGY. and the Cretaceous beds were fairly well understood : indeed of old the Drifts were looked on as more or less of a nuisance, because they hid underlying formations, and were therefore, neglected. 3. Because of the varying characters and the irregular arrangements of the Drifts (not realised until the study of these beds was started), which give so wide a scope for opinions as to their age and origin and so full a chance for that controversial element that appeals so strongly to the geologic mind. 4. Because these late deposits bear so largely on past geographic questions, the origin of our rivers and valleys, the evolution of the present surface and its scenery. 5. Lastly, there is the fact that some of these deposits are more or less intimately connected with the life, both animal and vegetable, that now exists, and especially with the advent of man and the history of his early tools and weapons, subjects which seem to admit of almost boundless discussion, for we never tire of hearing of ourselves. APPENDIX. Since reading the above it occurred to me that it would be useful to give a list of the Geologists' Association Excursions in our County, especially as some of these refer to our somewhat neglected Chalk and Eocene beds. Then it seemed that it would be useful, at all events to our new members, who may have only the late volumes of the Essex Naturalist, to have some reference to the papers in that Journal : so I have added shortened titles only of these (93), in chronological order, again excepting those relating to water-supply, as well as a few short notes. These also show an excess of work on Drift and Recent beds, adding but little matter on Chalk and Eocene beds ; but they introduce papers on deep underground geology, on physiographic subjects, on earthquakes, subsidences and coast- loss : they therefore fill up gaps in the outside literature, and they certainly give further evidence of the activity of our members. EXCURSIONS OF THE GEOLOGISTS' ASSOCIATION IN ESSEX. Reported in their Proceedings 1890-1914. Arranged in alphabetical order of the place or district visited. Ballingdon (under Sudbury), 1914 ; Chelmsford, 1891, 1895 , ? Chingford, 1911; Epping Forest, 1896, 1910 ; Essex Museum; 1906 ; Grays, 1891 (and railway to Upminster), 1893, 1901, 1903, 1911 ; Ilford, 1893. 1899; Laindon Hills, 1907; Rayleigh Hills,