William S. Clark
After returning to Ireland and completing his college courses, Mallet went to the United States for the purpose of acquiring information for his father. He resided there for the rest of his life, but never became an American citizen. In 1854, he was appointed professor of analytical chemistry at Amherst, where a Göttingen friend William S. Clark held a leading position, but in January 1855 moved to the State Geological Survey of Alabama and became professor of chemistry at the University of Alabama. He served in that capacity, with a brief leave of absence spent at Mobile, until the American Civil War. In the autumn of 1861 he enlisted as a private in a troop of Confederate Cavalry, but almost immediately was chosen as aide-de-camp on the staff of General Robert E. Rodes. He