Vocabulum; or The Rogue's Lexicon is an arresting lexicographical compendium of nineteenth-century criminal slang, translating the cant of thieves, confidence men, gamblers, prostitutes, and streetwise urban subcultures into respectable print. Its style is brisk, classificatory, and documentary, yet it belongs as much to the literature of urban sensationalism as to philology. Published in the context of antebellum New York's rapid expansion, it records a hidden language shaped by poverty, policing, migration, and the theatrical self-fashioning of the underworld. George W. Matsell was especially positioned to compile such a work. As New York City's first chief of police and later a prominent editor connected with crime reporting, he observed the practical importance of slang in identifying suspects, decoding testimony, and representing criminal life to the public. His professional proximity to courts, jails, patrolmen, and informants gave the lexicon both institutional authority and a reform-minded, surveillance-inflected purpose. This book is recommended to readers interested in historical linguistics, criminology, urban history, and the genealogy of American slang. It is not merely a glossary but a revealing artifact of how society names, fears, studies, and romanticizes its margins. This enriched edition has been carefully crafted to add value to your reading experience. - Hand-picked Memorable Quotes shine a spotlight on moments of literary brilliance. - Interactive footnotes clarify unusual references, historical allusions, and archaic phrases for an effortless, more informed read.