For Whitman Publishing Company I am completing a manuscript,

I am including a chapter on the history of collecting these tokens, which began during the Civil War itself when such numismatists as Edward Groh, Thomas Cleneay, J.N.T. Levick, James Hughes, and Henry K. Ezekiel, among others, had special pieces struck to their order. A mystery has arisen in that in the December 1869 issue of the American Journal of Numismatics, Levick stated that Groh had the very finest collection of Civil War tokens in existence, with the runners up being George B. Davis and John Hanna. I know a lot about Groh (his collection was later gifted to the American Numismatic Society where today it forms the core of its holdings in that specialty), but I know nothing about the token-collecting activities or biographies of Davis and Hanna. Can anyone help?