Now widowed, Mary married Robert Garret's longtime, personal physician, Henry Barton Jacobs, in 1902 at Grace Protestant Episcopal Church.
[1] While the hospital was turned over to the city in 1923, Jacobs continued to maintain the facility with her own funds and set up six free clinics under the direction of Dr. William S. Baer.
[1] Jacobs supported the American District Telegraph Boys of Baltimore and served as the treasurer of the Aviator Club, which raised money for a sanitarium for tuberculosis in the Blue Ridge Mountains of Maryland.
[4] With her fortune, Mary Frick Garrett Jacobs amassed a collection of European paintings from the 15th to 19th centuries, tapestries, miniatures, porcelain, and jades.
[3] Her paintings included works by Rembrandt, Frans Hals, Charles Willson Peale, Pietro Perugino, Jacob Isaakszoon van Ruisdael, Jean-Baptiste Greuze, Bartolomé Esteban Murillo, Thomas Sully, and George Romney (painter).