52 
THE ESSEX NATURALIST 
Sketch Map of the Upper Valley of the Cam, showing the Neolithic Sites 
in relation to the Geology, Water Supply and Recent Settlements. 
Ik. : Ickleton. Lb. : Littlebury. L.C. : Little Chesterford. Wd. : Wenden. 
Wk. : Wicken. C.HL. : Chiswick Hall. C.H. : Coploe Hill. R.H. : Ring Hill 
Camp. G.D.W. : Grimms Dyke Wood. 
