Here is references to documents on "Old" John's marriage to Margareth Etherington etc.
I have found this on Ancestry and I don't know which archive they reside in. It is definately "old" John, as there are references to "late of Christian-sound, merchant, now of Kingston upon Hull" and "Thomas Moses, George Moses and Isaac Moses at Christiansound".
Ref No. D/X 649/193
24 January 1763
(1) John Moses of Kingston upon Hull, merchant
(2) Margaret Etherington of Kingston upon Hull, spinster
(3) Henry Etherington of Kingston upon Hull, Esquire; John Porter and Thomas Wilkinson of Kingston upon Hull, Esquires Articles of Agreement for the marriage settlement of (1) and (2). Each party bringing in £5000 to be settled on (3) in trust for (1) and (2) and their issue as specified.
Ref No. D/X 649/194
Consent of John and Margaret Moses to the sale of stock by the trustees of their marriage settlement, 6 March 1766
(1 paper)
Ref No. D/X 649/195
Probate of the will of John Moses, late of Christian-sound, merchant, now of Kingston upon Hull, dated 2 February 1771 devising: Old Park, Broadwood and Stanner Close and other lands in the parishes of Wolsingham, Stanhope and Lanchester; Kings Meadow and the fishery in Northumberland, near Newcastle, upon trust for his daughter Jane Moses as specified with remainder to the issue of his nephew George Moses and cousin Thomas Moses of Newcastle upon Tyne. Codicil devising his house at Ferraby, Yorkshire to his wife for life, 24 April 1773
[The testator drew up the above will himself and expressed considerable distrust and dislike of lawyers and more particularly his wife's kinsmen and his nephew George. There are stringent conditions regarding marriage in general, continued residence in England, marriage to women of English nationality and an obligation to take the surname Moses incumbent upon the tenant in possesion of the settled estates]
(parchment, 3 membranes)
Ref No. D/X 649/196
Volume containing:
The will of John Moses of Kingston upon Hull, Esquire 2 February 1771; queries and answers of counsel regarding the terms of the will; various estate accounts, lists of rents etc., miscelleaneous bonds, agreements, promissory notes; the will of Jane Etherington of Kingston upon Hull, spinster, dated 13 June 1766; inventories; surrenders of property in the Manor of Wolsingham miscellaneous correspondance between Thomas Moses at Wolsingham, the Rev. John Coxon at Sunderland, Henry Etherington at Kingston upon Hull, John Philipson at Broadwood, Thomas Moses, George Moses and Isaac Moses at Christiansound, Norway etc; bill of complaint and answers in John Coxon, clerk, and others v Thomas Moses of Newcastle upon Tyne and others, in Chancery, 1773 - 1783
(1 volume, vellum bound)
Ref No. D/X 649/197
Hawthorn estate rentals 1774-87 examined at the request of Sir Henry Etherington, Bart. with regard to money invested under the marriage settlement of John Moses, 24 June 1787
(1 volume, card bound)
Ref No. D/X 649/198-199
Copy of the case concerning the will of John Moses with the opinions of R. Osborne and Thomas Plumer of Lincoln's Inn thereupon, 17 November 1800 - 1 January 1801
(2 papers)
Ref No. D/X 649/200
'An account of the receipts of rents and for other effects late belonging to John Moses, Esquire, and payments therefrom,' n.d. [1770's - 1780's]
(1 booklet)
Comments on the documents about his will seem to understate his strong mind/character, also found in letters to his nephews.
Tom Kaasen