William & Alice Isherwood 1860 Census lookup please

[angi0]

WOndering if anyone can help with the us census looking for WIlliam and Alice Isherwood who had a daughter in america ann isherwood is on the 1871 uk census listed as 8 years old and born in America WIlliam isherwood father was born in Preston lancashire in 1838 Alice isherwood was born in Walton Lancashire in 1833 but often changed her age =/- 5 or so years they are back in Blackburn in 1866 and have a son born there just wondering if they may have been on the american census and it could be possible they even married there as we cannnot trace a marriage either in the UK unfortunately it just says america no area

any help would be appreciated
Angie