In CENSUS 1834 (Marvinslund, Vium, Viborg)
87 she was working as a “tjenestepige” on Marvindslund Hovedgaard, age 32.
By CENSUS 1840 (Marvinslund, Vium, Viborg)
88 she had become “huusjomfrue”, age 38. The farm’s “bonde” did not have a wife during these years, just he and the workers show on the censuses.
Shown on Tilgangsliste (Thorning, Viborg)
89 as arriving in Thorning from Marvinslund in 1840, age 38.
Very unusual that she was married at age 38.5. She's listed as "Jomfrue" rather than "Pige", which indicates that she was older but had never been married.
She was 39 when Marie Cathrine was born. She would have been 44 when JTP Jr. was born.
CENSUS 1850 (Graae, Thorning, Viborg)
24 shows her name as Ane Birgithe Jensen født Levring and her age as 47.
Her headstone shows her name as Jensen=Levring.