There is a gang of thieves around Cambridge which is making a business of stealing bicycles, and we warn all men owning machines to be careful about leaving them unlocked. This gang has been at work since the middle of the summer and has now grown so bold that a bicycle was lately taken from the piazza of a private dwelling even at noon-day. We know of seven that have been stolen during the past month. A youth was captured yesterday who confessed that he had taken two machines, but while he was yet in custody another bicycle disappeared. The necessity for care still remains. Cambridge police have shown themselves incompetent to stop wholesale stealing, however officious they may be in cases of student discipline. We hope they will soon wake up to the fact that this gang of bicycle thieves must be broken up.