I am so fortunate as to count Shamrock Jolnes, the great New York detective, among my muster of friends. Jolnes is what is called the "Inside man" of the detective force. He is an expert in the use of the typrwriter, and it is his duty, whenever there is a "murder mystery" to be solved, to sit at a desk telephone at Headquarters and take down the messages of "cranks" who phone in their confessions to having committed the crime.
But on certain "off" days when confessions are coming slowly and three or four newspapers have run to earth as many different guilty persons, Jolnes will knock about the town with me, exhibiting, to my great delight and instruction, his marvelous powers of observation and deduction.
Shamrock Jolnes, O. Henry.