[2] Proby was the fifth son of John Proby of Elton Hall in Elton, Huntingdonshire, MP for Huntingdonshire (1722–27) and Stamford (1743–47), and his wife Hon.
His elder brother was John Proby, 1st Baron Carysfort.
[3] He was educated at Jesus College, Cambridge; and ordained in 1750.
He held incumbencies at Exton, Doddington, Thornhaugh and Wansford before his time as Dean.
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