Ulyses Petit de Murat was born in Buenos Aires on January 28, 1907 and was interested in literature and journalism from a young age. He was in charge of the music page in the daily magazine "Crítica" and, with Jorge Luis Borges, co-directed its literary supplement. In 1932 he moved to the motion film section of "Crítica" and in 1939 wrote his first cinematographic script for the movie "Prisioneros de la Tierra", an adaptation of four tales of Horacio Quiroga, made with his son, Dario Quiroga, who later in 1940 wrote "Con el Dedo en el Gatillo", with the collaboration of Homero Manzi.