Hippolytus

“ For towards the west and east of the two hemispheres is situated the head of the Dragon, in order, he says, that nothing may escape his notice throughout the same quarter, either of objects in the west or those in the east, but that the Beast may know all things at the same time. And near the head itself of the Dragon is the appearance of a man, conspicuous by means of the stars, which Aratus styles a wearied image, and like one oppressed with labour, and he is denominated “Engonasis.” ”