The police detective usually lacks the training, education, and social experience to make him effective in dealing with the class of elite criminals who make high society their field.

Yet, of course, it is this class of crooks who most excite our interest and who fill the pages of popular detective fiction.
The headquarters man has no time nor inclination to follow the sporting duchess and the fictitious earl who accompanies her in their picturesque wanderings around the world.

He is busy inside the confines of his own country.

Parents or children may disappear, but the mere seeking of oblivion on their part is no crime and does not concern him except by special dispensation on the part of his superiors.

Divorced couples may steal their own children back and forth, royalties may inadvertently involve themselves with undesirables, governmental information exude from State portals in a peculiar manner, business secrets pass into the hands of rivals, racehorses develop strange and untimely diseases, husbands take long and mysterious trips from home--a thousand exciting and worrying things may happen to the astonishment, distress, or intense interest of nations, governments, political parties, or private individuals, which from their very nature are outside the purview of the regular police.