I think the William Dodwell you mention is my Great, Great Grandfather. I have not been able to find his exact birth details as yet. Some of the details I have are as follows
William DODWELL born Long Crendon c.1818. died Aug 02 1894. Married on 29 Dec 1852 in parish Church Hambledon to Mary GAMMON born c.1827 in Skirmet/Hambledon, Bucks. died 7 Jul 1894. Mary's fathers name was John, profession Artizan. Witnesses George Gammon & Martha Gammon
1861 Census William was listed as Blind and Ocupation as basket maker. Mary as Grocer Draper.
1871 Census William and Mary both listed ocupations as Grocer Draper.
I hope these details are of help. I do have quite a bit more if your friend is interested.