Do you have Luxembourg ancestors who passed through Jackson County Iowa? (Imagine my raised hand here!) Here are a few ideas for researching their past...
1) Start with reading more about the history of Jackson County in my previous posts:
2) Check out what's available on FamilySearch. These records trace birth, marriage, and deaths.
3) There's some historical information on Genealogy Trails.
4) Google News has links to modern newspaper articles.
And there's much more available!