In New York, the two main Brooklyn baseball clubs, the Excelsiors and the Atlantics, played a tight game at the Atlantics' ground at the corner of Marcy and Gates Avenues. The most remarkable feature of the afternoon, however, was the massive crowd that turned up to watch. The press estimated that around fifteen thousand spectators were packed into the ground, a record for baseball. The Atlantics won the contest 15-14. (By John Osborne)
Source Citation
"Baseball: Great Match Between the Atlantic and Excelsior Clubs of Brooklyn," New York Times, August 10, 1860.