I saw your posting. I believe Joseph Iredale is the brother of my Great Grandfather James Iredale. I believe I've located records of his gravesite in Sweet Water, Wyoming. I just started researching my family tree last year so you probably have a lot more information than I do. I'd be happy to share what I have. Please let me know what you've found. I'm trying to verify but I believe I have an 1851 England Census that shows Joseph and Elizabeth of Flimby, England to be parents of John Iredale who married Matilda (Matilday).
Thanks,
Bruce Iredale