 She married medical student Arthur Butler on January 5, 1907, practicing independently until his graduation from Northwestern University Medical School in 1909.In 1910, Evanston-area hospitals became closed to the increasing African-American population for non-emergency care.To meet the resulting need, in 1914, Dr. Isabella Garnett and her husband, Dr. Arthur Butler, founded the Evanston Sanitarium and Training School on the upper floor of their 1918 Asbury Avenue residence in Evanston, Illinois.