Possibly Italian in origin, this unfinished treatise appears to have been compiled by a student or university teacher for his own use. An explanation of the theory of the circulation of the blood suggests a certain familiarity with the doctrines of William Harvey (expounded from 1616 onwards); although the author prefers to cite Galen's "De Pulsuum Causis" as his authority on matters relating to the functions of the heart, and refers to Galen as his principal authority throughout.