 In 1919 he wrote the manifesto of Ultraism, and in the same year collaborated with Jorge Luis Borges and Tristan Tzara in writing an automatic poem.He elaborated on Ultraism with a "Vertical Manifesto", which appeared in 1920.The same year, with José de Ciria y Escalante, he launched "Reflector", which Tzara included in his list of "présidents Dada".