Vinatge autographed baseball-Reach American League

I just inherited a Ban Johnson, Reach Official American League baseball. It appears to have the autographs of John McGraw, H. Ruel (Muddy?), and Ed Walsh, and multiple others. Looks like they used fountain pens, and the ball looks old, with red and blue sttiching. I'm in the Boston area, and am looking for suggestions on how to verify authenticity and get an appraisal.