That's a very interesting image! I don't know if any of this helps but here's some information I found after a quick search.
1. SABR reference to an 1876 Alaska amateur baseball club of New York City (
link)
2. Reference to an amateur "Alaska" club that played at the Union Grounds in the late 1870's (
link)
3. An excerpt from a book titled Eye on the Sporting Scene with reference to an "Alaska Nine of New York" club that was expelled in 1876 from playing on the Union Grounds due to gambling (
link)
I'm not sure if the above links all refer to the same team but imho I believe it is the same amateur baseball club that played in New York at that time.
Perhaps the page notation is tied to a book on the history of baseball in New York???