My 2nd great-grandfather's elder brother George Hirst was born on 23 October 1816 in Wortley, near Leeds UK, the son of William & Hannah Hirst.
I've so far been unable to find any conclusively matching UK records for George (other than his baptism parish record) and wondered if he might have emigrated.
I have found a potential match for him on the Gladiator passenger list 1838 - London to New York.
I've also found a potential match for him in 1840 in Philadelphia, Pennsylvania referred to as 'Section II Alphabetical Index of Naturalization Records 1794-1880'.
Unfortunately, the listing shows insufficient detail to identify him.