Conversation so far:
What did Jedediah Smith do in the Third Rendevous of 1827?
As agreed, Ashley had sent provisions for the rendezvous, and his men took back 7,400 pounds (3,400 kg) of Smith.
Are there any other interesting aspects about this article?
Smith and the other survivors were again well received in San Gabriel.
What was Smith's purpose in San Gabriel?
The party moved north to meet with the group that had been left in the San Joaquin Valley, reuniting with them on September 19, 1827.
What did they do after September 19, 1827?
Unlike in San Gabriel, they were coolly received by the priests at Mission San Jose, who had already received warning of Smith's renewed presence in the area.
When did Smith leave Mission San Jose?
CANNOTANSWER.
Are there any other interesting aspects about this article?
Also as before, Smith and his party remained in California hunting in the Sacramento Valley for several months.

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