Here's an image of some stuff...
1- the front page of Harper's Weekly Journal of Civilization,
that is William Ewing, Captain of the New York Base-Ball Club, on
the cover of the NOv 9, 1889 issue. It is 16" tall, not the 12" mentioned
in Mr. Lipset's Encyclopedia.
2- to the right of that is a quarter I bought from Scott Brockelman who
assured me that it was once one of Leon's quarters.
3- and there's a Joe Doyle white border tobacco card for size comparison
4- and at the bottom is an opened, bound volume of Harper's New Monthly
Magazine, volume XLVI, December 1872 to May 1873. Pages are 9 1/4" x
6 1/4", there are no covers to the issues, just pages, 1 to 952. It is just
over 2" thick. There are woodcuts in it, as shown, but I find no baseball
woodcuts.
So I think there are 3 things out there: the original Harper's woodcuts from
the Weekly, the reprints that are slightly smaller and a confusion for some,
and the Harper's Monthly that won't have any baseball woodcuts in it.
FW