Neither that signature or the ball pre-date 1902. I have likewise never seen an inscription on a Lemon Peel Ball that was not a trophy ball. Basically the practice of signing a Baseball did not happen pre 1910's and did not become popular until the 1920's. ANY SIGNED BASEBALL before 1920 you should be VERY skeptical about.
I am sure that 39,900 of his baseballs are authentic including some big names. I would be willing to bet the other 100 (pretty much anyone who died pre WW2 as a single signed ball) are probably not authentic.
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