The following baptism is found at familysearch.org and also ancestry:
Name Thomas Margaret
Gender Male
Christening Date 08 Oct 1780
Christening Place SAINT MARY DE LODE,GLOUCESTER,GLOUCESTER,ENGLAND
Father's Name Richard Margaret
Mother's Name Elizabeth

and in the Parish Records on this site:
6 October 1777 Richard MARGRATE married Elizabeth BANISTER at Gloucester St Michael

Mike