acts, and also some stanzas with acrostic verses such as "el bachjller fernando de royas acabo la comedia de calysto y melybea y fve nascjdo en la puebla de montalvan", which means "the graduate Fernando de Rojas finished the Comedy of Calisto and Melibea and was born in La Puebla de Montalbán." (This is the reason it is believed that Rojas was the original author of the play.) A similar edition appeared with minor changes "Comedia de Calisto y Melibea", Sevilla, 1501 A new edition entitled Tragicomedia de Calisto y Melibea (Tragic Comedy of Calisto and Melibea) (Seville: Jacobo Cromberger) appeared in 1502. This version contained 5 additional acts, bringing the total to 21. Another edition with the title Tragicomedia de Calisto y Melibea (Tragic Comedy of Calisto and Melibea) (Valencia: ) appeared in 1514. This version contained those 5 additional acts, with the total of 21. In 1526 a version was published in Toledo that included an extra act called the Acto de Traso, named after one of the characters who appears in that act. It became Act XIX of the work, bring the total number of acts to 22. According to the 1965 edition of the play edited by M. Criado de Val and G. D. Trotter, "Its literary value does not have the intensity necessary to grant it a permanent place in the structure of the book, although various ancient editions of the play include it." Characters Rojas makes a powerful impression with his characters, who appear before the reader full of life and psychological depth; they are human beings with an exceptional indirect characterization, which moves away from the usual archetypes of medieval literature. Some critics see them as allegories. The literary critic Stephen Gilman has come to deny the possibility of analyzing them as characters, based on the belief that Rojas limited dialogue in which interlocutors respond to a given situation, so that the sociological depth can thus be argued only on extratextual elements. Lida de Malkiel, another critic, speaks of objectivity, whereby different characters are judged in different manners. Thus, the contradictory behavior of characters would be a result of Rojas humanizing his characters. One common feature of all of the characters (in the world of nobles as well as servants) is their individualism, their egoism, and their lack of altruism. The theme of greed is explained by Francisco José Herrera in an article