Handwriting of Geniuses

Many people have heard of the mirrored handwriting of Leonardo da Vinci (1452-1519),

—Handwriting.org

but few know that another genius, St. Thomas Aquinas (1225-1274), wrote Latin with a littera inintelligibilis, an "unintelligible lettering:"

Manuscript page showing “littera inintelligibilis,” written and autographed by St. Thomas Aquinas.

—"St. Thomas Aquinas," New Catholic Encyclopedia

St. Thomas apparently dictated his writings to a handful secretaries simultaneously because he could not get his thoughts down fast enough. This might explain his littera inintelligibilis.