Charles Matthew Prior was a nineteenth- and twentieth-century English landowner and bloodstock breeder. Kelly's Directory described him as lord of the manor of Adstock in 1899, and biographical records place him at Adstock Manor during the early twentieth century.

Residence at Adstock Manor is corroborated by Burke's Peerage material and the University of Cambridge Alfred Newton Papers catalogue, but those sources do not independently establish a later conveyance.

Research sources:
- Kelly's Directory of Buckinghamshire, 1899, parish description of Adstock, reproduced in the Forebears transcription; corroborative early twentieth-century directory and official notices identify Charles Matthew Prior at Adstock Manor. — https://forebears.io/england/buckinghamshire/adstock