A constable, before he is promoted, must serve at least five years—in practice, the average is eight years—and must then pass two examinations. One of these is set by the Civil Service Commissioners to test his education, the other is an examination in police duty before a board of high officials. Should he be approved then for promotion he is immediately transferred to another division. These examinations are carried out at every step in promotion. In the words of a keen American observer:
"That such a system is successful in bringing to the front the best men available, that it is carried through without favouritism or political considerations, that, in its fairness and justice, it has the confidence of the uniformed force is a splendid commentary not only on the integrity of the Commissioner and his administrative assistants but on the stability and sound traditions of the entire department."
CHAPTER XI.
The Riddle Department.
The perpetual solving of riddles is one of the commonplace duties of Scotland Yard, not only in the C.I.D., but in every branch of the business. Luck may, and sometimes does, help a detective to solve a mystery; but luck never helps to quell a riot or maintain order on the King's highway in times of stress.
It is for such matters as these that they keep a Riddle Department at headquarters. They call it the Executive Department, but no matter—as Mark Twain would say. It is there to supply the answers to the conundrums that are always cropping up in police work.
Everyone in the Metropolitan Police who wants to know anything goes to the Executive Department. And it does a heavy work by the sheer light of common-sense and a meticulous organisation which is ready for anything, for many of its riddles are simply variations of the great one:
"Here are twenty thousand men who must eat and sleep and guard seven hundred square miles and seven millions of people; how can we concentrate a hundred, a thousand, or ten thousand swiftly into a particular district to meet an emergency without leaving other places unguarded?"