Wampum the spoken language is. Records and treaties are kept in this manner, and individuals could write letters to one another in this way. Wampum belts were used as a memory aid in oral tradition, and were sometimes used as badges of office or as ceremonial devices in Indian culture such as the Iroquois. The 1820 New Monthly Magazine reports on a speech given by chief Tecumseh in which he vehemently gesticulated to a belt, pointing out treaties made 20 years earlier and battles fought since then. The National Museum of the American Indian repatriated eleven wampum belts to "Iroquois" chiefs
Chimú culture only identified and discussed very few specific shell workshops. One workshop, which was thought to be maintained by the Chimú people, was identified at Túcume in the Lambayeque Region of Peru by archaeologist and researcher Daniel Sandweiss. Dating back to around 1390-1480 A.D., the workshop comprised various small rooms and contained evidence for the production of "Spondylus" beads. Shell debris from all stages of production, ranging from cut pieces to finished beads, along with the stone tools used to work the shell, were excavated from the site. While many archaeological sources point to the abundance of shell-working, as the remains