_a._ Surface soil 7" _b._ Clayey alluvium 7" _c._ Peaty alluvium 9" _d._ Brown clayey alluvium 1' 6" _e._ Peaty alluvium. 9" _f._ Brown clayey peat with trees scattered throughout _g._ and lenticular beds of freshwater shells in it 4' _h._ Peat with trees to 2' diam. 4' _i._ Mottled green and grey clay with lines of sand and gravel giving out water 2' _j._ Yellow clay with springs and much rusty water at bottom. 4' ------ 18' 2" ====== (1) Skull and a few other bones of horse. (2) Broken fragments of bone. _Scale_ 8' to 1" [Illustration: Fig. 4. Section seen in pit dug for material for making up the roadway east of the new bridge over the Ouse by the railway station. Ely, 1910.] If now we travel about 30 miles a little west of north we shall arrive near the shore of the Wash about half way across its southern coast line at Sutton Bridge. Here I had an opportunity of seeing the material of which the alluvium is composed. With a view to securing a sound base for the foundation of the piers of the Midland and Great Northern Railway bridge an excavation was made through the whole of the Fen Beds down to the Boulder Clay which as I have already stated was reached at a depth of 73 feet. The clerk of the works kindly gave me the following measurements (Fig. 5). Depth Thickness