Bruce - I came across this interesting blog which seems to explain it..fascinating read. The image captured is actually a game in 1860.
https://ourgame.mlblogs.com/unraveli...y-b443c0541c96
"Further snooping has revealed some truly startling information about the game’s most celebrated and valuable image: the 1866 Currier & Ives lithograph “American National Game of Base Ball: Grand Match for the Championship at the Elysian Fields, Hoboken, N.J.” Long believed to depict the 1865 match between the Atlantic of Brooklyn and the Mutual of New York, it has turned out be something else entirely: a fantasy game, one that the baseball world desired but that never was played."
"An August 1, 1860 ad by a book seller in the Buffalo Daily Courier of August 1, 1860 mentioned that pictures of the recent match between the Atlantic and Excelsior (played on July 19) appeared in the current edition of Demorest’s New-York Illustrated News, which would have been the issue of July 29 [actually it was August 4]."
While I don't think there was a photograph of the 1860 game, the likenesses of the players in the illustration are taken from actual photographs of the teams depicted.