She would go on to write and arrange music for Irish tenor John McCormack and for the Philadelphia Orchestra under the direction of Leopold Stokowski.
[2] In 1916, she married Frank Seaver, a lawyer who had helped draft the first charter for Los Angeles County.
He went on to make a fortune manufacturing oil drilling equipment first for Edward L. Doheny and later for his own Hydril Company.
[2][3] Blanche served on the board of several organizations, including Children's Hospital Los Angeles, Pomona College, and the University of Southern California.
[2][4] Following Frank's death in 1964, Blanche became a benefactor of the young George Pepperdine College in South Central Los Angeles, which, due in large part to her donations, opened a campus in Malibu, California and was renamed Pepperdine University in 1971.