Buck Hawk, Detective or The Messenger Boy's Fortune w/Direct link technology (A Detective Classic)

"Can you furnish me with a trusty messenger boy for a couple of hours-- one, mind you, who is reliable in every sense of the word, and quick-strung, in the bargain?"
This question was addressed to the clerk at the receiving window of a branch office of the Western Union Telegraph Co. in Philadelphia, one morning previous to the opening of the Bi-Centennial celebration in the Quaker City.