Harry A. Lewis

Harry A. Lewis is credited as the author of Hidden Treasures; Or, Why Some Succeed While Others Fail, a motivational work published in the late 1880s and now widely available through public-domain libraries.

The book presents sketches of well-known people who rose from modest beginnings, using their lives to argue that persistence, character, and purposeful effort matter more than luck. Beyond that title, reliable biographical information about Lewis himself is scarce in the sources I could confirm, so it is safest to remember him primarily through the book he left behind.