Michael Preston (1792-1849) was born in New Hampshire; his first wife, Mary Merrill, was born there in 1795. This couple removed to Canada not long after their marriage, ca18 June 1816. Most or all of their five known children were born at Canada:
- Caroline Preston (1819-1839)
- Michael Merrill Preston (1821-sometime aft 1845)
- Joseph William Preston (1826-1893)
- Lemuel Keyser Preston (ca1828-ca1881)
- Ellen (Preston) Crawford (ca1831-1852)
Michael Preston returned to New Hampshire some time before 1840, but there are few traces of his children before 1850 and for some, still later. For the most part, the children are adults by the time I have located a record about them, and by then, they are residing in the US.
In 1830-1850, would these children have needed to be naturalized after they immigrated to the United States? What if they immigrated after the age of 18? 21? Would it have mattered if one or both parents had been born in the United States?
Update: At about age 22, Michael Merrill Preston (eldest son) married 1843 at Connecticut. He naturalized 16 May 1851 at Boston ("Index to New England Naturalization Petitions," Ancestry.com; card P623).