A sharper is an older term, common since the seventeenth-century, for thieves who use trickery to part an owner with his or her money possessions. Sharpers vary from what are now known as con-men by virtue of the simplicity of their cons, which often were impromptu, rather than carefully orchestrated, though those certainly happened as well. The 1737 Dictionary of Thieving Slang defines a sharper as "A Cheat, One who lives by his wits." In the nineteenth century, and into today, the term is more closely associated with gambling.
Sharpers were romantic figures in the eighteenth-century, valued as...