Finished Robert A. Heinlein pencil portrait #RAH #RobertAHeinlein #Heinlein #pencils #portrait #scifiart #sciencefictionmasters August 11, 2016 instagram 0 Finished Robert A. Heinlein pencil portrait #RAH #RobertAHeinlein #Heinlein #pencils #portrait #scifiart #sciencefictionmasters heinleinpencilsportraitrahrobertaheinleinsciencefictionmastersscifiart