Mike Leeman - has this Family tree on Ancestry - and does list the MUSHET

Robert F MUSHET married Mary Ann THOMAS born 1819 St Briavels (record on this website : 23 August 1818)

Mary's parents were: John THOMAS 1775-1853 and Catherine PARRY 1789 - 1863

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Their marriage certificate is on Ancestry

Robert MUSHETT and Mary Ann THOMAS

15 December 1841, Cheltenham

Robert MUSHETT - Father: David MUSHETT - Free Miner
John THOMAS - Farmer