Perhaps the most outlandish account of Hy-Brasil is that of Captain John Nisbet. He claimed to have, in 1674, come upon a mysterious island while traveling from France to Ireland. He and his shipmates entered into a deep fog, and their ship landed in shallow waters upon a beach shrouded in mist.
As they disembarked and explored the strange island, they found it to be the home of large black rabbits and a wise, grizzled magician, who invited them into his castle home. He explained, or so the story goes, that he had cast a spell on the island to prevent it from being seen by ordinary eyes – but the spell had somehow been broken. He gifted them gold and silver, and sent them on their way.