Marriage: James William ROBERTS / Ellen BENNETT

[Gravestock]

Am struggling to find marriage records of:

JAMES WILLIAM ROBERTS (born Great Missenden, Herts 1862/1864) and
ELLEN ROBERTS (born Crockernwell, Devon 1871/1872)

In January 1891 they were living in Paris Street, Exeter and on their daughter's birth certificate Ellen was named as Lily.

If anyone can help it would be very much appreciated.

Thank you,

S