In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Upton like this:
UPTON, a parish in Eton district, Bucks; adjacent to Slough r. station. It contains Chalvey hamlet, and parts of Slough and Salthill. Post town, Slough. Acres, 1,950. Real property, £19,799; of which £200 are in gasworks. Pop. in 1851, 3,573; in 1861, 4,688. Houses, 843. The property is much subdivided. ...
The living is a vicarage in the diocese of Oxford. Value, £300.* Patron, the Bishop of Oxford. The old church is Norman, and was recently restored. The new church is a plain brick edifice, and was built in 1837. A chapel of ease is at Chalvey, and was built in 1861. There are an Independent chapel of 1853, a Wesleyan chapel of 1847, a mechanics' institute, a reading room, national schools, a British school, and Eton workhouse.
GB Historical GIS / University of Portsmouth, History of Upton, in Slough and Buckinghamshire | Map and description, A Vision of Britain through Time.
Date accessed: 25th April 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 " Upton ".