The Harry Williams Mortuary no longer exists under that name and I have no idea who bought them out, if that is what happened, or what was done with the office records.
Mt. Olivet Cemetery is still here. The address is 270 Los Ranchitos Rd., San Rafael, CA 94903. Phone: 415-479-9020
Here are the inscriptions on their stones plus office record information: Agnes V. Lydon Sec. H, Row 17, Grave 1 born MO Feb. 22, 1883 died Aug. 9, 1964 buried Aug. 11, 1964 Informant: Mrs. Patricia Furlong
Thomas N. Lydon Sec. H, Row 17, Grave 1 born N.D. died June 29, 1945, age 56 buried June 30, 1945 Informant: Agnes V. Lydon