Here is Ida's death notice, it said she is buried in Evergreen Cemetery.
St. John - Ida B. 725 16th Ave. Beloved Mother of Justeena Eleanor St. John; Mrs. Ida Maude Smedberg, Seattle; Mrs. Kathryn Mensmer, Santa Cruz, Calif. Services at Johnson & sons, Monday 1 P.M. Interment Evergreen.
Seattle Daily Times, July 24, 1955. Page 49
Her obit, same page and date
Mrs. Ida B. St. John
Mrs. Ida B. St. John, 76 of 725 16th Av, died Friday at her home. Mrs. St. John, born in Little Rock, Ark., came to Seattle 37 years ago. She had been living at the home of her daughter, Miss Justeena St. John.
Surviving are two other daughters, Mrs. Ida Maude Smedberg, Seattle, and Mrs. Kathryn Menzmer, Santa Cruz, Calif. and five grandchildren.
Funeral services will be at 1 P.M. in the Johnson & Sons Chapel. Burial will be in Evergreen Cemetery.
I do not find her listed in Forest Lawn or Evergreen. Evergreen-Washelli is mostly online. She may have not had a stone, or it is too worn.
I could not find an obit for Bert.
Bert appears to be buried at Forest Lawn, and there is a picture of his stone, but it is pretty much illegiblehttp://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=st...