In his will he wrote that he was of Dorchester, Oxon but referred to his freehold yarda(?) land in the parish of Long Wittenham, Berks. He then referred to his son John to whom he left this Long Wittenham property.  This established, I think, that he was the father of John Sheen who was by that time the occupier of Long - or Little - Wittenham.

In the will he also names a son Nathaniel, a brother in law Francis Saffar(?), s sister in law, Jane Williams widow, the poor of Little Wittenham, Berks
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His burial, from FamilySearch:

First name(s)  John
Last name      Sheen
Gender         Male
Event year     1783
Burial year    1783
Burial date    09 Jun 1783
Burial place   Little Wittenham, Berkshire, England
Place          Little Wittenham
County         Berkshire
Country        England
Record set     England Deaths & Burials 1538-1991
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His will probate on TNA:

Will of John Sheen, Gentleman of Dorchester , Oxfordshire
Reference:       PROB 11/1106/415
Description:     Will of John Sheen, Gentleman of Dorchester , Oxfordshire
Date:            30 July 1783
Held by:         The National Archives, Kew
Legal status:    Public Record(s)
Closure status:  Open Document, Open Description

In his will, dated 30 July 1779, he lists:

‘My son John Sheen’,
‘My son Nathaniel Sheen’,
‘My brother-in-law Francis’,
‘My servant Mary ????’,
‘My sister-in-law Jane Williams widow’.

John the son was his sole executor.
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