This is a map of the Parish of Bitton from 1842. Cock Road can be see just to the right of Hanham. Note that the original is marked 1842 however, the map shows the Midland Branch Line (now the Bristol-Bath cycle track) which was not opened until 1869. See the Avon Valley Railway website for more details.
A full version of The History of The Parish of Bitton in the County of Glousceter. by Rev. H. T. Ellacombe can be found on Archive.org.