Twenty-third Street was a street in New York City. This street intersected with Fifth Avenue. This street was located in Manhattan.
In The Big Good-Bye, the master criminal Silent Forrester was chauffeured along this street to Fifth Avenue. His taxi was being tailed by Detective Jim Tierney and his squad. (TNG: "The Big Goodbye")
The pages seen in the episode are from the detective novel, The Listening Man, by author John A. Moroso. This novel was published in 1924. Information on Twenty-third Street was from page 138.