I have a map circa 1840 that has the birket named "The New Fender" and the fender called "The Ford Brook". I also have a map circa 1844 that has the rivers named as they are today, as in the birket and the fender. Is it a map makers "mistake" or did a name change occur? both river are land drainage streams, Fender means, ditch or or improved water tract. Birket is a place name not a river name. there was a family named Bickett who had a house near the junction of the river and the wallasey pool, their name spelling varies ( could be birket birkett etc) could it be named after them? can anyone shed some light on the rivers of the north wirral?