Charles Sabine Augustus Thellusson was a member of the Thellusson family associated with Brodsworth Hall and extensive Yorkshire landholdings, including Adwick le Street. The Imperial Gazetteer identifies S. A. Thellusson as owner of the Adwick manor in 1870–1872.

The identity of S. A. Thellusson is supported by the contemporary initials and family landholding evidence, but the acquisition instrument has not been located.

Research sources:
- John Marius Wilson, Imperial Gazetteer of England and Wales, 1870–1872, entry for Adwick le Street, reproduced by GB Historical GIS and Vision of Britain; English Heritage, Brodsworth Hall family and landholding material. — https://www.visionofbritain.org.uk/place/1302