 The fact that the book is written not in Classical Armenian ("grabar") but in the vernacular is evidence that the author wanted to make it available to ordinary people.Heratsi speaks at lengths on the symptoms of various fevers; for example, he gives a clinical prognosis of three types of malaria, namely, quotidian ("miorya"), tertan (alternate days, "yerekorya"), and quartan (three days apart, "chorekorya").The manuscript was discovered in 1727 in Constantinople and was purchased by the National Library of Paris.