Possible Clues:

• Stag party performance taking a very long time
• Hunter turned into a deer by Artemis
• His view of immortality led to his own mortality
• Hunter's exploit over a long period
• A horse ultimately kept in London district — a hunter
• Hero of Greek myth, transformed into a stag and killed by his own hounds after seeing Artemis naked
• Hunter in exploit over long period
• Mythical hunter turned into a stag
• Hunter in exploit over enormously long period
• Peeping Tom having to do time?