Just checked the Notts Archives catalogue again and there are a large number of documents that are on there now, that I'm sure were not there previously. Large number about the Slaters. Does seem to support the Mansfield baptism.
DD/WM/1/11
Will of William Slater of Weston, yeoman
26 Apr 1789
To son William, messuage, maltkiln and all real estate in Weston, charged with payment of £20 to son Thomas. All personal estate to William, executor
DD/WM/1/6-7
Indentures of lease and release, assignment of mortgage term (reconveyance)
19-20 Oct 1784
(1) Joseph Atkin, of Weston, yeoman, (second son of late Joseph Atkin)
(2) William Atkin, of Normanton on Trent, yeoman, (eldest brother of (1))
(3) William Slater, senior, of Weston, yeoman
(4) George Hutton of Carlton on Trent, gentleman
Reciting above mortgage, and £300 repaid, for £700 (1) by direction of (2) to (3) premises as above, and (1) to (4) term of years on same
Signatures, mark and seals of all
Parchment
DD/WM/1/8
Indenture, demise, mortgage
10 May 1785
(1) William Slater senior, of Weston, yeoman and William Slater, junior of Weston, miller
(2) John Parker of East Retford, esquire
For £500 (1) to (2) 1 messuage and malt kiln in occupation of William Atkin, homestead (1 acre). 0.5 acre meadow in Dovecoat Meadows, 2 leys (1 acre) in Rushwong or Mill Hill close, Sheep Coates close (1acre), Jack Acre (5 lands and 1 headland) in Highgate field, 1 land on Carter Leys in Hawbuskfield, 6 beastgates in meadows and 1 on Rail Moor( formerly Tompkin's). Also Meadow side close (4 acres), 3 lands on Carter Leys furlong and 2 on Burnt Mill Hill in Hawbuskfield, 4 lands abutting on Jack Acre headland and 2 on Middle furlong in Highgate field, 6 lands on Byards Whong in Rudding field in Weston, also 2 beastgates in Normanton on Trent Holm. All in occupation of William Slater senior, (purchased from Atkin). Also 1 rood in King Henry's field and wind corn mill thereon in Weston, in occupation of William Slater junior (purchased from Jonathan Killingar). For 1000 years, void on repayment.
Mark, signature and seal of (1)
Parchment
DD/WM/1/9
19 Apr 1786
(1) John Parker of East Retford, gentleman (administrator of J.P.)
(2) William Slater senior and junior, as in DD/WM/1/8
Reciting above mortgage, for £523 14 shillings (1) to (2) premises and term of years as above.
Signature and seal of (1)
Parchment
DD/WM/1/10
Indenture, demise, mortgage 14 Aug 1786
(1) William Slater senior, of Weston, yeoman
(2) William Preston Wallhead of Weston, gentleman
For £150 (1) to (2) messuage, maltkiln and homestead (2 acres) in occupation of (1) in Weston. For 1000 years, void on repayment
Mark and seal of (1)
Parchment
Endorsed reconveyance 1 Jan 1829
(1) Joseph Smith of Newark, gentleman (administrator of William Preston Wallhead)
(2) Thomas Smith of Carlton on Trent, gentleman
Reciting former repayment etc, (1) to (2) premises and term of years as above
Signature and seal of (1)
DD/SP/63/46
18 May 1847
(1) Henry Slater of Rochester, County of Monroe, State of New York, America, brewer
(2) Thomas Wilson of Norwell, farmer
Reciting earlier deeds, now, for £100 (1) to (2) reversionary interest in £100 payable on death of (1)'s mother, wife of (2), and £40 unpaid balance of £50 legacy left to (1) by grandfather William Slater of East Retford, yeoman, (1) appoints (2) attorney to recover monies
Signatures and seals of both
(272646)
DD/WM/1/12-13
Indentures of lease and release
18 - 19 Mar 1790
(1) William Slater of East Retford, miller and wife Elizabeth
(2) William Hunt of Weston, farmer
For £243 (1) to (2) messuage and homestead (2 acres) in occupation of Joseph Taylor and maltkiln in occupation of (1) in Weston. Covenant to levy a fine.
Signatures and seals of (1)
Parchment
DD/WM/1/14-15
Right and left hand indentures of a fine
1790
Easter George III (1790)
William Hunt, plaintiff
William Slater and wife Elizabeth, deforciants
1 messuage, 1 maltkiln, 2 acres pasture and common of pasture in Weston
£60 sterling
Parchment
DD/WM/27/5
Indenture, feoffment
22 Jun 1782
(1) Jonathan Killingar of Grassthorpe, miller
(2) William Slater, junior of Weston, miller
For £120 (1) to (2) 1 rood in King Henry's field and windmill thereon in occupation of (2) in Weston. Signature and seal of (1). Endorsed livery of seinsin. Parchment
DD/WM/27/6-7
Indenture of lease and release
19 - 20 May 1789
(1) William Slater of East Retford, miller
(2) John Lowe of Maplebeck, farmer
For £140 (1) to (2) windmill and its tackle on 1 rood in King Henry's field in occupation of Thomas Lowe in Weston. Signature and seal of (1). Parchment