The first meeting between Mr. Barnes, the detective, and Robert Leroy
Mitchel, the gentleman who imagines himself to be able to outdo
detectives in their own line of work, was fully set forth in the
narrative entitled _An Artist in Crime_. Subsequently the two men
occupied themselves with the solution of a startling murder mystery, the
details of which were recorded in _The Crime of the Century_. The
present volume contains the history of several cases which attracted
their attention in the interval between those already given to the
world, the first having occured shortly after the termination of the
events in _An Artist in Crime_, and the others in the order here given,
so that in a sense these stories are continuous and interdependent.