Marie Hull Sketch Book, thirteen unsigned pencil sketches of willow tress and clouds. These have been authenticated by Local Shop, believed to be done on one of her trips to Colorado; each print 6" h., 9" w. Marie Hull Sketch Book, thirteen unsigned pencil sketches of willow tress and clouds. These have been authenticated by Local Shop, believed to be done on one of her trips to Colorado; each print 6" h., 9" w.