David Leverton has a will of Henry Bateman of Little Langdale, parish of Grasmere dated first of November 1723.

He leaves legacies to his daughter Jane and to "Richard Cumstone her husband my son in law"; other legacies to his son John, daughter Margaret and Arthur Mackereth

There is a further family will in 1813 - see below.
Jane Bateman is in my data with details as follows:

1655 Ambleside Cumpstone Richard of Grasmere (whose father
was also Richard of the Ambleside paper mill started 1624) christened PR CRO
30.12.1655
1692 Ambleside Hawkeshead COMPSTONE Richard married Jane
Walker of Grasmere spinster marriage bond dated 15 Aug 1692/ 16.8.1692

1703 Ambleside M016822 Grasmere Cumpstone Richard Jane
Bateman marriage IGI 17 Jun 1703 His 2nd wife
1723 Ambleside Will Little Langdale Ambleside CUMPSTONE
Richard married to Jane Bateman - will of Henry Bateman of Collwith naming
Richard

I have extensive entries for the family from 1600 until this in 1813:
1813 Ambleside WD AG box 58/5 below Stock Ambleside Cumpstone Jane
81 Will proved 12 April 1813 See Page 1