Intelligence, persistence, reliability, are the foremost essentials.

But these qualities, while enabling one to achieve success in subordinate posts, seldom carry one to commercial or professional heights; to the all-commanding peaks of power and glory.

The industrial king is monarch by reason of his ability to give efficient direction to the labor of others.

The present-day detective king wields his scepter for precisely the same reason.
As great business campaigns are managed and directed from a desk in the office of the president or manager, so the ceaseless war against criminals is directed from the desk of the detective chief.

For, be it remembered that the chief function of a detective force is to obtain evidence that will convict.
In ninety per cent.