Fox or Wolf. A 'leaping one'? If 'wolf' then a link to 'centaur'. ''Aratos wrote of The Wolf constellation as parts of it in which ''the Centaurs right hand holds'' as an offering to the gods on the Altar {constellation?}, and so virtually a part of the Centaur; but Eratosthenes describe it as a Wine-skin from which the Centaur was about to pour a libation; while others imagined both the 'Beast' and the wine-skin in the Centaurs grasp." [Page 278 'Star Names their Lore and Meaning']. And/or: ''The Arabian title for this constellation was the Leopard or Panther. With the Akkadians it was the Beast of death or the Star of the Dead Father." Same book. And/or: And/or: Sack is an antiquated wine term referring to white fortified wine imported from mainland Spain or the Canary Islands.