Alice Underwood (Papworth) - Is this correct?

This is a bit late for a "contract marriage". The way it used to work was that two sets of parents would get together and agree that the son of one would marry the daughter of the other, the marriage to "become official", as it were, when both parties reached physical maturity. (It was done among Royalty as late as the 1470s, when Anne Mowbray was contracted to Richard of York, the younger son of Edward IV. Neither child was more than five years old. (She died at age 8, and Richard...disappeared with his older brother in 1483.)

Such contracts were considered to be the same as, and just as binding as, a full-on marriage ceremony.

The custom had, mostly, fallen out of favor by 1600.