In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Heywood like this:
HEYWOOD, a chapelry in Westbury parish, Wilts; near the Somerset and Weymouth railway, and near Salisbury plain and the boundary with Somerset, 1 mile N of Westbury. It was constituted in 1849; and its post town is Westbury. Rated property, £3, 179. Pop. 516. Houses, 119. The property is divided among a few. Heywood House was built by the Leys, in the time of James I.; and passed to the Phippses. There is a mineral spring. The living is a vicarage in the diocese of Salisbury. Value, £300.* Patron, H. G. G. Ludlow, Esq. The church is very good..
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Heywood has changed, please see our redistricted information for the modern district of West Wiltshire. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Heywood and units named after it.
GB Historical GIS / University of Portsmouth, History of Heywood in West Wiltshire | Map and description, A Vision of Britain through Time.
Date accessed: 25th May 2016
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Heywood".