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The information we have about Zerah Colburn comes mostly from his Memoirs of Zerah Colburn by Himself, published in 1833. Colburn wrote in the third person, referring to himself as “Zerah,” or “the boy,” in a detached manner, and his book includes examples of his powers and detailed recollections of his life.
https://youtu.be/c0MFl14KcL4
