Ramon Gabriel was a Chicago School painter active in the 1940’s & 50’s. Gabriel disappeared in the late 1950’s at the height of his career. He is recognized as one of the standout WPA artists active with the South Side Center for Art in Chicago. 
According to The Chicago Council on Fine Arts catalog for their 1978 show, ‘Gabriel was cited by American Magazine of Art as belonging to ... “One of the most lively and original groups of American artists anywhere to be found.” Gabriel is an artist who found his metaphor quite early and all of his work show no marked departure from those done in the late 1940’s.’ 

Bio courtesy of www.artadoo.com. Link to full bio:

http://www.artadoo.com/en/display/artist/name/ramon-gabriel/id/18943