Allcroft was an apartment building in New York City.
In The Big Good-Bye, one of the females who called the master criminal Silent Forrester at the Plaza lived at the Allcroft. The cops who interrogated her believed that she was from Australia and was born in England. She worked in a bank. (TNG: "The Big Goodbye")
The pages seen in the episode were actually from the detective novel, The Listening Man, by author John A. Moroso. This novel was published in 1924. Information on Allcroft was from page 145.