In discussing the Right of Discovery, the historian Troy R. Johnson states in The Occupation of Alcatraz Island, that indigenous peoples knew about Alcatraz at least 10,000 years before any European knew about any part of North America.
在關於“發現者擁有權”的討論中，歷史學家Troy R. Johnson在《佔領阿爾卡特拉斯島》（The Occupation of Alcatraz Island）中提出並確認土著居民在歐洲人知道北美之前至少10000年前便已經知道了阿爾卡特拉斯島。