Girolamo Cavalcabo (Hieronyme Calvacabo, Hieronimo Cavalcabo) was trained in the Bolognese school of fencing, possibly under Angelo Viggiani dal Montone, and seems to have traveled to London, England in the 1580s or 1590s. While in London, he wrote a treatise on the use of the rapier entitled "Nobilissimo discorso intorno il schermo" ("Most Noble Discourse on Defense"), published in 1597. In the early 17th century, he served as fencing master at the court of Henry IV of France to prince Louis (the future Louis XIII).