Here are two pages of New York By Gas-light.

As described by the publisher:

First published in 1850, New York by Gas-Light explores the seamy side of the newly emerging metropolis: "the festivities of prostitution, the orgies of pauperism, the haunts of theft and murder, the scenes of drunkenness and beastly debauch, and all the sad realities that go to make up the lower stratum—the underground story—of life in New York!"

From the Police Gazette