A female Native informant who was of the tribe foiled the plans of hostile Senecas to burn "Le Griffon" as she grew on her stocks. The unrest of the Seneca and dissatisfied workmen were continually incited by secret agents of merchants and traders who feared La Salle would break their monopoly on the fur trade. When the Seneca again threatened to burn the ship, she was launched earlier than planned in Cayuga Creek channel of the upper Niagara River with ceremony and the roar of her cannons. A party from the Iroquois tribe who witnessed the launching were so impressed by the "large floating fort" that they named the French builders "Ot-kon", meaning "penetrating minds", which corresponds to the Seneca word "Ot-goh", meaning supernatural beings or spirits. The tumultuous sound of "Le Griffon's" cannons so amazed the Native Americans that the Frenchmen were able to sleep at ease for the first time in months when they anchored off shore.