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J LevineUmm...if it is coprighted (copywrited) with a date then somewhere there should be a record of when it was printed and how many. Library of Congress maybe? Patent Office? If someone was really obsessing about it they could make a check there. Also, I think that the theory that the scorebooks were purchased and held onto unrealistic. It is more likely that the store ordered a large printing (did they print them themselves?) in 1866 and just sold them for the next 20 years or so. I love this mystery.
Hal, I see what you were saying about leaving the door open.
-Joshua