See the context of this sign.

Fur Traders' Rendezvous

The Rocky Mountain Fur Company, headed by Milton
G. Sublette, David E. Jackson and Jedediah S Smith,
conducted a fur trading rendezvous in this vicinity
in June-July, 1827, taking 139 bales of beaver furs
for shipment to St. Louis by pack train. Sublette had
left St. Louis in March with 60 men and merchandise,
arriving via South Pass in late June. The trading was
concluded and all parties dispersed in mid-July
1827, following the return of Smith from a perilous
journey to California. Traders were also here in 1828.
Large bands of indians frequently gathered here.

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