48PA2789 was the first locality where glass beads were discovered after a major wildland fire had burned off much of the surface vegetation. The locality had been fully documented before the fire (all artifacts visible on the ground surface mapped and recorded) and a total of 319 chipped stone artifacts were observed. After the fire (see Todd 2015), the the site was revisited and the beads, as well as metal artifacts recorded (total 1st post-fire number of artifacts recorded = 1747). Given the lack of red-heart beads, use of this locality is mostly likely pre-1840 (Billeck 2008).
Billeck, W.T. (2008). Red-on-White drawn or Cornelian Beads: A 19th-Century Temporal Marker for the Plains. Beads 20:49-61.
Todd, L.C. (2015). A Record of Overwhelming Complexity: High Elevation Archaeology in Northwestern Wyoming. Plains Anthropologist Memoir 43 60(236):67-86.