In his right hand he held a key, because he invented doors; and in the other, a staff, because he presided over public ways. […] By these wives he had a great number of children, and he was often connected with female mortals, by whom, also, he had children. […] By her he had Triton. […] and how is he represented? […] When he rides in a chariot, he is drawn by black horses. — See Fig. 39.