Can't find the marriage but Maria's maiden name was Fuller. They had a son Charles William on the 21 November 1848 in St Helier Jersey. He was baptized on the 10 December 1848 in St Helier Jersey. Charles was a tailor. His godparents are down as being his Parents and the Minister was A Croker.
The next child is Maria Honor Pitman born 19 July 1851 in St Helier, Baptized 3 August 1851 St Helier Charles Pitman is her Godfather Hannah Warr is her Godmother Minister is E. G. Renouf.
This is Maria on the 1841 Census in Guernsey.
Elizth. Herbet 65 E
Maria Fuller 29 Y
George Predain 24 Baker E
Henry Pope 20 Tailor E
Benjamin Benway 23 Printer F
In District 4 St Peter Port Guernsey. Which has boundaries
High Street as far as Bertelot Street, Berthelot Street, Clifton Mont Gible Steps national School Street and Arcade.
Unfortunately I cannot give you any more information on Maria Fuller or her parents.
Hope this helps.