Nice postcard! [Indians at Tahoe]...
I knew there were still a few Native American Indians living their traditional life in California at least into the 1910s, albeit with a far reduced range. In the Sierras, not sure about anywhere else. Just that seems a little mind blowing.
Googling the subject when posting the card, it said the last village in Yosemite was dismantled in the early 1930s and replaced by cabins, with those in use by the tribe until 1969. 1969!