St. Clair Guards Membership Explorer
Explore documented roster appearances, estimated membership continuity, name variants, and the unit’s growth from its 1844 founding through the final pre-war roll in 1860 and transition into Company H of the 62nd Pennsylvania Infantry.
Membership through time
Move through the years and compare names actually recorded in a year’s roster against the broader inferred membership span.
Members documented in 1860
Select a name to inspect its full roll-book record.
Search the full membership
Filter all 244 records, sort the table, and export the current results.
| Member | Entry est. | Last seen | Roster years | Span | Confidence | 1860 |
|---|
Estimated entry cohorts
How many records are assigned to each estimated year of entry.
Confidence distribution
The source dataset’s assigned confidence level for each resolved member identity.
Length of inferred span
Records grouped by the duration field supplied in the refined timeline.
Final pre-war roster
Members documented in the 1860 roster—the closest roll-book snapshot to the unit’s 1861 transition.
Most persistent roster presence
Members with the greatest number of distinct documented roster years.
Source and chronology signals
Useful indicators for prioritizing manual review of the underlying roll book.
Browse the original roll book
View the full-resolution page images extracted directly from the 136-page PDF scan. Source-page buttons in every member profile open the corresponding manuscript page here.
Two different kinds of evidence
Documented roster appearance means the member’s record explicitly lists that year in YearsSeenInRosters. This is the strongest year-specific evidence displayed here.
Inferred active span includes every year from EntryYear_Est through LastRosterYearSeen, inclusive. It is useful for visualizing continuity, but it should not be read as proof of attendance, activity, or uninterrupted membership in every intervening year.
What the 1860 roster can establish
The 1860 view identifies the final documented pre-war membership in this dataset. It provides the best starting population for studying the St. Clair Guards’ transition into Company H of the 62nd Pennsylvania Infantry.
It does not establish that every person listed in 1860 enlisted, mustered, or served with Company H. That conclusion requires comparison against the 62nd Pennsylvania’s military roster and related service records.
Name resolution and confidence
The app displays the preferred member name while preserving every spelling listed in VariantSpellingsObserved. Confidence and uncertain-source share are shown exactly as supplied so users can distinguish firm identifications from tentative ones.
Source page numbers are exposed as working buttons in every profile. Selecting one opens the corresponding original manuscript image in the Original Pages viewer for direct verification.
Known coverage limitations
- No 1855 roster appearances are present in the supplied YearsSeenInRosters field.
- Some records list a roster year earlier than their estimated entry year; these are flagged rather than changed.
- The app visualizes membership evidence, not drill attendance, offices held, event participation, or Civil War service unless those facts are added to the underlying dataset.
- The dataset ends with the 1860 pre-war roster and a 1861 timeline endpoint.