Humberto "Cacho" Costantini (April 8, 1924 – June 7, 1987) was an Argentinian writer and poet whose work was influenced by Buenos Aires slang (porteño). Biography Costantini was born in Buenos Aires, the only child of Italian Jewish immigrants who lived in the barrio of Villa Pueyrredon. He married Nela Nur Fernandez and the couple had three children, Violeta, Ana und Daniel († 2022). A medical veterinarian, he practiced near the city of Lobería, Buenos Aires Province. In 1955, he returned to the city of Buenos Aires where he worked in various jobs: veterinarian, salesman, potter, and medical researcher. Meanwhile, he worked tirelessly in off-hours, "nailed to the chair" as he said, writing and rewriting his novels. Costantini was politically active from his youth. In his student days he confronted the Fascists of the Alianza Libertadora Nacionalista and was a member of the Communist Party until serious differences of opinion with the bureaucratic and pro-Soviet leadership caused him to leave it. He greatly admired Ernesto Che Guevara. In the 1970s he was actively engaged with the revolutionary left and was on official blacklists. In 1976, Costantini was forced into exile in Mexico where he continued writing. He suffered in an exile that obliged him "to glance through the lists for his loved ones, as if the city had been hit with a typhoon." He conducted narrative workshops regularly, made programs for radio and for television, and he fell in love. As he said on his return: "In short, I lived." Costantini returned to Buenos Aires in 1983 after seven years, seven months and seven days in exile. An admirer of Osvaldo Pugliese, Anibal Troilo ("Pichuco"), and Eduardo Arolas, Constantini was a Tango singer, dancer, and amateur historian. He also composed milongas and tangos, some of which were published and recorded. Costantini died on the morning of 7 June 1987 following an on-going case of cancer. The night before, he worked on the final novel of his trilogy, La Rhapsodía de Raquel Liberman. This work remains unpublished. Works Costantini's oeuvre included short stories, poetry, plays, novels, and radio programs. His first book of stories, De Por Aquí Nomás, was published in 1958. His novel De Dioses, Hombrecitos y Policías (The Gods, The Little Guys and the Police), written while in hiding from the dictatorial government, was awarded the Casa de Las Américas Prize. His unfinished work, Rapsodía de Raquel Liberman, recounts