Senior surname line
The genealogy places John “Jack” Poston in the senior branch descending from John Poston III. That branch carries forward through Alfred Poston to John Henry Poston.
Household record
The revised genealogy states that census evidence describes three sons and four daughters, while noting that the surviving excerpt develops only part of the household in detail.
Why he matters here
John “Jack” Poston is important less as a separate town-history figure than as a genealogical bridge in the surname line that later converged with the Andrew-linked branch through the marriage of John Henry and Louella Poston.
Published research
Documentary evidence and archive links
No dedicated documentary record for this entity is currently linked from The Poston Family Archive. The source basis here is the published book material listed below.