All of the covers below were done, for Argosy, by the artist Robert Graef.  Born in New York City, Robert Graef started his career in 1900 and was still active and working at the time of his death in 1951.  For those five decades, Graef worked out of the same art studio at 70 Fifth Avenue in New York.  As shown below, the work that he created in that studio has lived on: