De Veris Principiis Artis DimicatoriaeAbout the true principles of the art of fencing

About

"De Veris Principiis Artis Dimicatoriae, 
Tractatus breuis Ad Jllvstrissimvm Principem Ioannem Ducem Megapolensem"

"About the true principles of the art of fencing, a brief treatise for the illustrious Price Johann, duke of Mecklenburg" is an abridged version of the introduction to "Sciomachia et hoplomachia" which was published in the same year.