Abraham Lincoln worked as circuit lawyer in Illinois. The image below shows the tour Abraham Lincoln made through the Eighth Judicial Circuit in Illinois in 1850. The drawing is due to Richard P. Lufmin, Boston 1950. The image can be found on the web at the The Law Practice of Abraham Lincoln: A Narative Overview site, by John R. Lupton, Assistant Director and Assistant Editor, The Papers of Abraham Lincoln.

The TSP paper "Faster and faster and faster yet" by Jon Bentley, Unix Review 15 (1997) 59--67, contains a reference to this drawing of Lincoln's 14-city tour. Note that the tour is not quite optimal in terms of total length (if we take the usual Euclidean distance between the cities).