Featured on PDR in the collection The Flower of Battle: Italian Fighting Manual (ca. 1410)

Much as a denizen of the 21st century might turn to YouTube demonstrations or tailored smartphone apps in order to learn or hone certain skills, so the autodidact of the Medieval and Renaissance period would have turned to how-to-guides such as this fine example from early 15th-century Italy — Il Fior di Battaglia (The Flower of Battle). From The Getty, where the one of the copies is held: