Recap
In March 1855, the editor of the Clipper listed five teams that were "in good condition" and the locations of their twice-a-week practices – Gothams at Red House, Harlem; Knickerbockers, Eagle, and Empire at Elysian Fields at Hoboken , and the Excelsiors in Brooklyn. New York Clipper, March 3, 1855; provided September 2008 from the Mears Collection by Craig Waff.
The established Knickerbockers, Gothams, and Eagles from New York (Manhattan) play three matches round-robin in June. With the Empires, a local newcomer, they play five matches in September and October, a round-robin less one match.
Articles published later in the New York Clipper, the Spirit of the Times, the New-York Daily Times, and the Brooklyn Daily Eagle announced the first appearance in print of the following 18 new clubs in the Greater NYC region in 1855
I sincerely appreciate the research work, and the information being shared. It is important and interesting history.