« Reply #12 on: Sunday 06 September 15 16:44 BST (UK) »
Perhaps if Simon can give us the names and years of birth of the Stephen children we could get some clues from their names and a better idea of the year of marriage.
From the census records, I can see three children: Elsie b. abt. 1847, Maker; George b. abt. 1847, Maker (he vanishes after the 1851 census); and Mary b. abt. 1849, Maker (can't find her after 1861, but she could have married before 1871).
Btw- there was a Martha Stephen/Stevens/Stephens at East Stonehouse Devon born approx. 1815 on English 1891 Census . Perhaps this is the lady whose death you found in 1893?
Yes, just noticed her. There doesn't appear to be another death at an appropriate time in East Stonehouse for our Mary Stephen. There's a death for a Mary Stephen, birth approx 1820, in 1899 in Devonport... which according to my (admittedly scant) knowledge of that area, isn't a million miles away... Devonport and Stonehouse are now both parts of Plymouth, if I'm not mistaken...

Ruth
McArthur, Milne, Mitchell, Black, Robertson, Morrison, Slessor, Lawrence - Aberdeenshire/Banffshire. Muir, Waddell, Fraser, Orr, Cowden - Lanarkshire/Renfrewshire/Dunbartonshire. Dalziel, Dalzell, Gourley, Cromie, Crombie, Bell - Co Down. Lewis, Corrigan, Morris, Cox, Hay - Monmouthshire/Pembrokeshire. Baker, Ginger, Woodhurst, Swift, Jones - Kent/London.