Christian Frederick Duer was an older half-brother ofFrederick and Louisa Mohl. All three immigrated to the US, Frederick and Louisa as children with their parents Frederick and (--?--}Mohl to NY in 1832.
Frederick Mohl followed CF Duer to Houston and married Aurelia Hadley, b. Jackson, MS in 1850. Frederick/Fritz Mohl had a grocery store.Then he became proprietor of the Fanerin Hotel by 1860. Its customers were mostly young single men in their 20's. He hired an enslaved African-American woman to work at the hotel, in housekeeping, probably. She had a couple of young children who lived with her.
By 1854 Louisa and her husband Carl Court also moved to Houston, where their daughter Marie Aurelia was born. Carl first was a grocer.He and his family went to KY for a couple of years, where their daughter Ada was born, then returned to the Houston area.
Carl went into business with his brother-in-law Christian F. Duer. By 1860 they had a stage stop, stables and store in Rose Hill, on the stage road 35 miles north of Houston. Carl and Louisa had an 80-acre farm there on Spring Creek, where they grew cotton and crops. The youngest child, Frederick Mohl Court, was born there in 1860.
Christian F. Duer also had a cotton plantation nearby.In 1860 he held 22 enslaved African-Americans to work the land and cotton gin. According to historians, that number (20 or more slaves held) classified Duer as a planter, part of the white political and social elite.
It's likely that after his brother-in-law Carl Court's death in 1861, Duer loaned slaves to Louisa Court to work her farm. In 1860 she and her husband did not hold any slaves in their own name.Her children were young, the youngest only 18 months old.