155 A Survey and Comparison of the Natural and Inned Salt Marshes at Leigh-on-Sea, Essex BY JEAN E. MYERS, B.Sc. Lister-Scourfield-Main Memorial Prize Paper [Read by the author (Now Mrs. H. F. Gribble), 27 February, 1904] INTRODUCTION The area studied lies on the north bank of the River Thames, and to the west of Leigh-on-Sea Station. It extends as far westwards as Hadleigh Castle, and as far south as Hadleigh Ray. Approximately 50 yards north of the railway, the ground begins to rise steeply, and the base of this escarpment forms the northern limit of the area of study. The inned and natural salt marshes on the mainland have been considered in greatest detail, but a general survey of Two Tree Island has been carried out. Fig. 2. Showing the position of the area studied.