Wallace, William S., d.1867.

William S. Wallace received his medical degree from the University of Pennsylvania in 1824. He set up private practice in Lancaster County, Pa., but moved in 1836 to Sangamon County, Illinois, where he established himself in the burgeoning state capital, Springfield. He was a founding member of the Illinois State Medical Society. In 1839 he married Frances Todd, sister of Mary Todd Lincoln, who was married to Abraham Lincoln. Wallace became the family physician to the Lincolns. In particular he was called to attend the children during their illnesses. Although Wallace accompanied the Lincolns on the train ride to Washington, D.C., when they went to live in the White House, he did not officially attend the family during the Lincoln presidency, but instead served an appointment as a paymaster in the Union army. Exposure during his military service brought on his death in 1867.

From the description of Notes from the lectures of John Redman Coxe, M.D., professor of materia medica & pharmacy in the University of Pennsylvania, 1821-1822 / taken by Wm. S. Wallace, S.M. (College of Physicians of Philadelphia). WorldCat record id: 122440744

Wallace, a physician and drugstore proprietor, moved to Springfield, Illinois in 1836 and married Frances J. Todd (sister of Mary Todd Lincoln), May 21, 1839.

From the description of Financial papers, 1838-1867. (Abraham Lincoln Presidential Library). WorldCat record id: 647977052