!BIRTH Parish Register, Gjern, Skanderborg, Danmark, 1757-1800, p. 4 (Dansk Rigsarkiv,
Arkivalieronline.dk). Census 1801 Ellerup, Gjern, Gjern, Skanderborg, Danmark (Dansk Rigsarkiv, Dansk Demografisk Database) lists his age as 43.
!MARRIAGE Parish Register, Gjern, Skanderup, Danmark, 1757-1800 (Dansk Rigsarkiv, Dansk Demografisk Database). Betrothal also listed on p. 102.
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He is the only Niels Jensen born in Gjern 1757-1760.
No births/deaths of additional children in Gjern from 1790-1820.
Does not appear on 1834 Census, Gjern (checked original).