Please be aware that you posted this on the Nevada Family forum yet the only connection seems to be Nevada County in California.
Believe the following are your people although I've been unable to find them in California on the 1930 census.
California Death Index: Lorna E. Preston d.9/25/1924 Alameda County, 42yo, Cert#4055? (believe it is 40559). Louis Goodall Preston b.7/22/1887 other country, d.7/3/1942 Nevada County, Mother's maiden name Ling, S/S#447-07-2790. Lillie Maria Perry b.11/23/1916 Colorada, d.12/26/1990 Nevada County, Mother's maiden name Annis.
Did not find a California birth with surname Preston and mother's maiden name Annis.