Ann gives a different birthplace on the 1861 census.
1861 census RG9 1479 folio 101
Frog Street Tiverton Devon
Ann Quick 60 Cheriton, Devon, Head Widow Dressmaker
Sarah Ann Hill 3 Tiverton, Devon, Boarder
http://www.witheridge-historical-archive.com/promise.htm1871 census RG10 2171 folio 18
2 Castle Street Tiverton Devon
Ann Quick 68 Cheriton, Devon, Head Widow Dressmaker
Mary French 69 Cullompton, Devon, Lodger Lace Reeler Silk factory
Deaths Mar 1880
Quick Ann 79 Tiverton 5b 372
The 1861 census does show there was a Boundy born in Cheriton in the early C19th
1861 census RG9 1393 folio 73
6 Waterloo Place Exeter St Sidwell Devon
Jno Boundy 60 Cheriton Fitzpaine, Devon, Head Married Gardener
Elizth Boundy 66 Whitstone, Devon, Wife Married
Mary Jane Boundy 22 Exeter, St Sidwell, Devon, Daughter Unmarried
Thos Jno Robson Boundy 2 Exeter, St Sidwell, Devon, Son
On the 1851 census like Ann, John gives his birthplace as Exeter.
On the 1841 census a John Quick aged 12 was working as a servant in Cheriton Fitzpaine.
There was a John Quick in Tiverton aged 21 birth place unknown, servant to a farmer in 1851.
Devon Family History Society has a marriage index which I believe has a full county coverage 1813-1837, but their baptism index only begins from 1813.
http://www.devonfhs.org.uk/Regards
Valda