Looking at the Gloucestershire BDM Index -

http://ww3.gloucestershire.gov.uk/bmd/

These are the four COLE marriages which took place

District: Gloucester, Parish: Northgate - Building St John the Baptists

David COLE married Sarah WIGMORE - in 1849

James WOOD COLE married Hannah BRIMMELL - 1839

John COLE married Mary MORRIS - 1845 - your line

John COLE married Martha SMITH - 1848

(earlier message I gave baptisms at Haresfield - parents John & Mary COLE - which included

John - 12 December 1819 and David - 18 February 1821)

1841 Census, Gloucestershire St John the Baptists

same house

John COLE 20 - Railway Porter - born in County
David COLE - 20 - Raillway Porter - born in County

1851 Census, St John the Baptists

Alvis Street

David COLE - age 30 - Meat Salesman - born Standish (which is 1.9 miles from Haresfield & 4.6 miles from Harescombe)
Sarah COLE - 30 - born Minchinhampton
Maria MANNING - Visitor age 60
Sarah PINNETT - unmarried Visitor age 34
Caroline WIGMORE - age 25 Servant