Vince if there is a yacht club on any of the waters they usually can assist.Good luck.P.s. Have you seen the guide called Fishing 2001 ' a guide to where to fish in Northants'!, if not tel 01948871399 for a copy @ ?2.50
I know what you mean but they have tried.Have you considered British Waterways , they must have site maps for their waters.Another option is the E.A.they do fish surveys for the rivers that could be of use. They are free on request.