I have just begun to research my husband's family and he is from McCormick lineage too. I did find a link that does mention Jimmy McCormick as well as Daniel on pages 2/3. Here is the link: http://www.paintedhills.org/STEUBEN/grnhst.html

I believe that my husbands great-great grandfather was a brother to them both, but have not been able to prove that yet. His grandmother grew up on Rough and Ready in the McCormick family home, as she was a McCormick. Her name was Bertha, daughter of James and Gertrude McCormick, and grand-daughter of John and Catherine McCormick. It is John that I believe was brothers with Jimmy and Daniel.

Hope this helps and please let me know if any of this sounds familiar to you.

Thanks,
Missy