From the applications sent in, the best addresses are selected, rapid inquiries are made of tradespeople and others, and the lady whose house it is believed will best suit the purpose of the thieves is communicated with.

The footman, who is in league with a band of expert jewel-thieves, is a trained servant. It is necessary that he should be so to retain the place long enough for the plans of the gang to be matured.

He soon finds out the ways of his employers and the whereabouts of the "stuff" that is desired. The rest is easy. He communicates all the necessary information to his colleagues, gives them notice of the arrival of a favourable opportunity, leaves everything arranged to facilitate a noiseless entry into the premises, and has nothing further to do with the "job." These jewel robberies generally take place in the evening, while the family are at dinner at home, or dining out, or at the theatre. No one has any suspicion of the footman. He always arranges to be with the other servants as much as possible at the time the robbery is being skilfully effected.

The lady's maid is a favourite "plant" servant, and is sometimes more useful to the gang than the footman. The lady's maid has frequently possession of her mistress's keys, and she is able to take a "squeeze" of any key that may be required by the burglars, who want to go to work noiselessly and expeditiously.

The "squeeze" is taken by pressing the key in a piece of specially prepared wax. With this impression in his possession, the intending thief can have a similar key made at once. He sometimes comes at the favourable hour armed, not only with a key of the safe or cabinet in which the jewel-case is kept, but with the key of the front door as well. He lets himself in quietly while the family are out, and the servants are downstairs, goes straight to the room in which the jewellery is, unlocks the safe or cabinet, and is out of the house with the plunder in a few minutes.

By obtaining a "squeeze" of a key in an office in which a number of clerks were actually sitting at the time, a safe was once opened while in transit on the South-Eastern Railway, which contained bullion to the value of many thousands of pounds, and the whole of it was successfully carried away.

Some of the biggest jewel-robberies that take place in London are planned, not as they used to be, in low dens and thieves' kitchens or taverns of evil reputation, but in luxuriously furnished houses and elegant flats. When you have made a five or ten thousand pound haul, it is much safer to drive home to a good address with the plunder in your smartly appointed brougham than go off with it in a four-wheel cab to a shabby neighbourhood across the water. The tools necessary for the job can also be carried with more safety in a brougham, and if you have an elegantly attired lady beside you dressed in ball costume, and blazing with jewellery, no policeman is likely to stop your carriage at 4 a.m. to inquire if you have been breaking into a jeweller's shop or a diamond merchant's office.

The expert bank-robber of to-day opens an account at the bank he intends to victimize. Sometimes he has been a customer of the establishment for months before he risks the trick by which the clerk of another bank doing business at the counter is robbed of thousands of pounds' worth of notes. The expert does not do the stealing himself; he merely engages the clerk behind the counter in conversation, and covers the operations of a confederate. This confederate is occasionally attired in the correct costume of a bank-messenger.

The profession of crime to-day has in its ranks men whose manners are those of the diplomatist, whose get-up is faultless, and whose fertility of resource would enable them to make a good living by honest means. But they have become captains of crime, and they prey upon society with a keen enjoyment of the sport.

Some of them carry on their operations upon the strictest business principles. They have their agents in the big cities of the Continent, they speak several languages, and travel about the world. They belong to an international society of malefactors which has frequently in hand at the same time a big job in London, another in Paris, a third in New York, and a fourth in Vienna. They travel first class, put up at the best hotels, and are delightful companions if you get acquainted with them in the railway train or on board ship. Occasionally they combine skill at cards with their other accomplishments, and during the American touring season they travel to and fro on the big liners and make a very fine thing of it.