What did the people on San Nicolas island use for shelter in the 1800's?

In the 1800s, the people on San Nicolas Island, known as the Nicoleño, primarily used materials available in their environment for shelter, such as grass and reeds. They constructed dome-shaped houses called "apaches," which were built partially underground and covered with vegetation for insulation. These structures provided protection from the elements and were well-suited to the island's climate.