Not sure if this is of any help but here are some St Briavels M.I.'s:
Surname Forename Burial Place Year Age Reference Number
GODWIN ELIZABETH ST.BRIAVELS:ST.M 1830 39 0003/00108
GODWIN FRANCIS ST.BRIAVELS:ST.M -- -- 0003/00108
GODWIN JANE ST.BRIAVELS:ST.M 1848 100 0003/00096
GODWIN JERIMIAH ST.BRIAVELS:ST.M -- -- 0003/00253
GODWIN JERIMIAH ST.BRIAVELS:ST.M 1860 31 0003/00253
GODWIN JERIMIAH ST.BRIAVELS:ST.M 1862 66 0003/00252
GODWIN MARY ST.BRIAVELS:ST.M -- -- 0003/00056
GODWIN RICHARD ST.BRIAVELS:ST.M -- -- 0003/00056
GODWIN RICHARD ST.BRIAVELS:ST.M 1860 33 0003/00253
GODWIN SARAH ST.BRIAVELS:ST.M -- -- 0003/00253
GODWIN SARAH ST.BRIAVELS:ST.M 1863 69 0003/00252
GODWIN WILLIAM ST.BRIAVELS:ST.M 1840 70 0003/00096

This entry from GFHS Burial Index:
Date: 17 JUN 1830
First Name: ELIZABETH
Surname: GODWIN
Age: 39
Parish: ST BRIAVELS 1813-1839
Place of Abode: COLEFORD

Mike