Ishi (? - 1916) was claimed to be the last California Yahi Indian. He was discovered in 1911 in the foothills near Mt. Lassen. His story was popularized in a book by Theodora Kroeber[?], wife of A.L. Kroeber, who worked with Ishi.
... the age of 18 living with them, 65.1% are married couples living together, 8.7% have a female householder with no husband present, and 23.4% are non-families. 20.1% of all ...