This could be a key card towards your research Steve, crop mark in the top right corner, plus the plate scratch. You now know where one card definitely was on the sheet
It also has a wet sheet transfer, which I noticed on at least one other scan posted too
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Please check out my books on baseball history. They include the bio of star second baseman Dots Miller. A book featuring 20 Moonlight Graham players who got into just one game. Another with 13 players who were with the Pittsburgh Pirates during the regular season, but never played a game. There's also one about 27 baseball families, as well as a day-by-day look at the worst team in Pittsburgh Pirates history. All five can be found here:
https://www.amazon.com/stores/John-D...hor/B0DH87Q2DS