Research into the Spanish literary sources that help illustrate the presence of the lexical Romani component has already been carried out by scholars with fairly comprehensive studies. However, the presence of Caló in most of these studies show an abundance of examples drawn mainly from 19th century literary works. Since the profusion of lexical items of Romani origin from 19th century sources contrasts sharply with the scarcity of the Romani lexical stock from 18th century literary works, an attempt has been made in this article to provide a detailed analysis and an overview on the literary sources from the 18th century that illustrate the use of Caló. This contribution aims to offer a reliable information on authors, literary works and motivations that lie behind the emergence of Caló lexical items documented mainly in l8th century dramatic works.