I find a Charles S. Rice in San Juan County WA Orcas Island in 1910 census. Age 53, b. NY NY NY retail merchant groceries. Wife: (looks like "Sope. A.") age 33 b. CA parents b. Germany
Frances age 8 daughter b, WA parents b. CA, NY.

adjacent household:
Rice, F.A. Head age 53 b. NY NY NY
" Dorothy, daughter, age 14, b. NY NY Conn.
Could this be your Charles? I don't find any Rice's in the 1920 census for the San Juan Islands.