While searching on the internet for photos of antique Penny Rugs in preparation for an upcoming lecture, I found a terrific website. The Quilt Index
It was conceived and developed by The Alliance For American Quilts in partnership with Michigan State University's MATRIX: Center for Humane Arts, Letters and Social Sciences Online and the Michigan State University Museum.
This site has an amazing 13,601 quilts currently in their index. The following photo is an example: Princess Feather is from the DAR Museum, vintage appx. 1800-1850.
If you are looking for inspiration or information, check out this site. Unfortunately, I'm still searching for photos of antique Penny Rugs!