The policy of making these grants was considered questionable. It tended to tempt officers of justice "to forswear themselves for the lucre of the reward," and the thirst for "blood-money," as it was called, was aggravated till it led many to sell the lives of their fellow-creatures for gain. There were numerous cases of this. Jonathan Wild was one of the most notorious of the dishonest thief-takers. In 1755 several scoundrels of the same ilk were convicted of having obtained the conviction of innocent people, simply to pocket the reward. Their offence did not come under penal statute, so they were merely exposed in the pillory, where, however, the mob pelted one to death and nearly killed another. Again, in 1816, a police officer named Vaughan was guilty of inciting to crime, in order to betray his victims and receive the blood-money. On the other hand, when conviction was doubtful the offender enjoyed long immunity from arrest. Officers would not arrest him until he "weighed his weight," as the saying was, or until they were certain of securing the £40 reward. Another form of remuneration was the bestowal on conviction of a "Tyburn ticket;" in other words, of an exemption from service in parish offices. This the officer sold for what it would bring, the price varying in different parishes from £12 to £40. It was not to be wondered at that a weak and inadequate police force, backed up by such uncertain and injudicious incentives to activity, should generally come off second-best in its struggles with the hydra-headed criminality of the day. Robberies and burglaries were committed almost under the eyes of the police. It was calculated that the value of the property stolen in the city in one month of 1808 amounted to £15,000, and none of the parties were ever known or apprehended, although sought after night and day. Such cases as the following were of frequent occurrence: "Seven ruffians, about eight o'clock at night knocked at the door of Mrs. Abercrombie in Charlotte Street, Rathbone Place, calling out 'Post!' and upon its being opened, rushed in and took her jewels and fifty or sixty guineas in money, with all the clothes and linen they could get. The neighbourhood was alarmed, and a great crowd assembled, but the robbers sallied forth, and with swords drawn and pistols presented, threatened destruction to any who opposed them. The mob tamely suffered them to escape with their booty without making any resistance." The officers of justice were openly defied. There were streets, such as Duck Lane, Gravel Lane, or Cock Lane, in which it was unsafe for any one to venture without an escort of five or six of his fellows, as the ruffians would cut him to pieces if he were alone.