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Question: Is there a link between Ethan Smith, author of ''View of the Hebrews'', and Oliver Cowdery?
Both Ethan Smith and Oliver Cowdery lived in Poultney, Vermont while Smith served as the pastor of the church that Oliver Cowdery's family attended
Critics postulate a link between Ethan Smith and Oliver Cowdery, since both men lived in Poultney, Vermont while Smith served as the pastor of the church that Oliver Cowdery's family attended at the time that View of the Hebrews was being written. Beyond speculation based upon this circumstantial evidence, there is no indication of a connection between View of the Hebrews, Oliver Cowdery, and the Book of Mormon.
This article from BYU Studies shows that the type of connection that critics align with Oliver and Ethan almost certainly did not exist.