Opps, wedding date for the above 2nd Dec 1857, Milton Keynes. John Ivens and Catherine Howe.
I'm sure there must be something in the Middx, B/p for James C Rubidge (1809).
I have found another coach builder in Middx, William C Rubidge (1821). These people are with William H Robinson and Henry Cox in High Str Stony in 1881.
I wonder if the C is Cox

funnier things have happened...
