I've noticed there was a Henry Main baptized at Whitehaven Holy Trinity 12 Oct 1810, birthdate given on IGI as 28 Jun 1810. Parents were Henry and Jane. Can't find any further trace of a Henry Main.
Possible parents to this Henry were the John Henry Mires and Jane "Puttinson" who married at the same church 12 Sep 1809, or about 9 months before the birth of Henry "Main".
Cheers,
Stephen