Conversation so far:
What did Jedediah Smith do in the Third Rendevous of 1827?
Smith left to rejoin the men he had left in California almost immediately after the rendezvous. He was accompanied by 18 men and two French-Canadian women, following much of the same route as the previous year.
What was Smith's purpose in San Gabriel?
Smith and the other survivors were again well received in San Gabriel after a retreat on foot across the Mojave Desert on the Mohave Trail to the San Bernardino Valley.
What did Jedediah Smith's parrty do after September 19, 1827?
Unlike in San Gabriel, they were coolly received by the priests at Mission San José, who had already received warning of Smith's renewed presence in the area.
When did Smith leave Mission San Jose?

Question: What did they discover in California?
Self-contained rewrite: What did Jedediah Smith's party discover in California?