Her philanthropic activities included the establishment of the Strong-Carter Dental Clinic at Palama Settlement in Hawaii, and the Strong Memorial Hospital in Rochester, New York.

Governor Carter died in 1933, and Helen remarried to Jean de Saint Cyr in April 1939.

The first meeting of the board of directors in July 1921 reported that, with the clinic only open one day a week with a hygienist and dentist, they had treated 1168 patients.

The festivities included a performance by the Royal Hawaiian Band and the President William McKinley High School Reserve Officers' Training Corps.

[10] In 1922, Helen and her sister Gertrude were the only two members of their immediate family remaining when they honored their parents with a $1,000,000 donation towards the building fund for the Strong Memorial Hospital at the University of Rochester in New York.