1. On mystery religions, see;Lane Fox;Macmullen (1981) and Anderson,1987
2. Chalk (1960) on the mysteries and mythology of Eros and the role of;On Longus
3. The religious atmosphere of Heliodorus has elicited the most commentary. See, in particular;Dionysus in the novel is the place to start, but for more nuanced views, see,1977