From 1939 to 1940 Dumas Oroño studied at the in
Montevideo, thanks to a scholarship from the Municipality of
Tacuarembó for winning the Departmental Artists' Contest. Then he entered the Escuela del Sur, the workshop of
Joaquín Torres-García, at the suggestion of
Zoma Baitler. In 1945 he moved to
San José to teach drawing classes at the city's high school. He taught high school until 1977, and was also a professor of teaching practice at the
Instituto de Profesores Artigas. Among them were Augusto Torres, ,
Ernesto Vila, , and . He founded the support commission for the
Juan Manuel Blanes Museum and helped plan a project to restore and expand the museum and its park and surroundings. A room of the museum bears his name. during Uruguay's full civic-military dictatorship, Oroño organized activities such as "cultural Saturdays" for students and neighbors, held in his own workshop in 1980 with the presence of
José Pedro Díaz and , among others. He was the author of didactic texts such as
La expresión plástica infantil (Imprenta López, Buenos Aires, 1951) and
El dibujo en el liceo (Imprenta AS, Montevideo, 1961, reissued by EEPAL, Montevideo, 1989). His
Cinco cuadernos pedagógicos remains unpublished. ==References==