1940 U.S. census, Skowhegan, Somerset County, Maine, ED 13-61, sheet 18A, line 15: Irving Oak, 38, lineman; highest grade completed, 5

Research source

Type	Census
Record date	1940
Where it is	NARA T627, roll 1492, page 18A; image held with the family tree
Held or published by	Ancestry
How it was read	Image examined; research dated 09-25-2026

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The family tree also cites this record: 1940 United States Federal Census.

Conclusions that use this source

His formal schooling ended at about the fifth grade. (Irving Gilbert Oak 1901–1981; beside a family recollection) Likely
He left school when he was 12 or 13. (Irving Gilbert Oak 1901–1981; remembered in a family recollection) Unconfirmed (context)

The person's evidence notes explain the assessment. What the labels mean.

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