Sheet Size: 25" x 38 1/2 " Nathanael Herreshoff's first America's Cup design was named Vigilant. Valkyrie II was the challenger in the 8th defense of the Cup in 1893. Herreshoff was at the helm when, in near gale conditions, the daring crew cut reef lashings and raised full sail to overtake Vigilant as she blew out a spinnaker.