She received a scholarship from the Center for Regional Cooperation for Adult Education in Latin America and the Caribbean (Centro de Cooperación Regional para la Educación de Adultos en América Latina y el Caribe; CREFAL) to attend the training course for Fundamental Education Specialists in Pátzcuaro, Michoacán.
In the absence of a stable job, she lived on small tasks that were given by some professors of the Faculty of Philosophy and Letters (mainly translations of French), with the help of her friends, and through the drawings and poems that she delivered at will or simply gave away.
Soust is the basis for the character of Auxilio Lacouture from the novel The Savage Detectives, in which Roberto Bolaño recreated the literary environment of that time.
Some witnesses maintain that Soust helped students to escape and put verses of León Felipe on the loudspeakers as a peaceful protest.
Alcira Soust died on 30 June 1997 at age 74, due to a respiratory infection, at the Hospital de Clínicas in Montevideo.