In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Highmoor like this:
HIGHMORE, a chapelry in Bix and Rotherfield-Greys parishes, Oxford; under the Chiltern hills, 4½ miles WNW of Henley-on-Thames r. station. It was constituted in 1860; and its post town is Nettlebed, under Henley-on-Thames. Pop., 333. Houses, 71. Pop. of the Rotherfield-Greys portion, 283. Houses, 60. The living is a p. curacy in the diocese of Oxford. Value, £101.* Patron, the Rector of Rotherfield-Greys. The church was built in 1859, and is in the early English style. There is a national school.
Highmoor is now part of South Oxfordshire district. Click here for graphs and data of how South Oxfordshire has changed over two centuries. For statistics about Highmoor itself, go to Units and Statistics.
GB Historical GIS / University of Portsmouth, History of Highmoor in South Oxfordshire | Map and description, A Vision of Britain through Time.
Date accessed: 28th March 2017
Click here for more detailed advice on finding places within A Vision of Britain through Time , and maybe some references to other places called " Highmoor ".