Leslie,
You'd love my "collection" from a burial site north of Chattanooga next to the Tennessee River that was about to be inundated with a new dam, back in 1968. I use it to teach something about the ancient cultures in this country using a mix of osteo and cultural I suppose. Dated by Univ of TN to 1100. None of my irises are that old, but they are more colorful!
A bit off topic, sorry.