robert burton, in his 1621 "anatomy of melancholy", refers to a depiction of morpheus, saying "philostratus paints [morpheus] in a white and black coat, with a horn and ivory box full of dreams, of the same colours, to signify good and bad". in carl michael bellman's "fredman's epistle" no. 72, "glimmande nymf", morpheus is invoked as the "god of sleep".