The Spiro Mounds site has produced many
unique artifacts. The engraved conch shell
cup in this picture is a nice example. The most
important and extraordinary finds from Craig
Mound are the shell engravings. The multitude
of images the engravings portray are the best
written visual history left behind on a single
America. The Phillips & Brown project of
recording shell engravings from Craig Mound
fragments of cups ("conch shell dippers"),
gorgets and other small miscellaneous pieces.
The Peabody Museum Press published the
study in "Pre-Columbian Shell Engravings".