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George Leonidas Leslie

George Leonidas Leslie
Born 1840
Died 1878
Body discovered June 4, 1878 in Yonkers, New York
Alma mater University of Cincinnati
Occupation Criminal
Spouse(s) Mary Henrietta Coath

George Leonidas Leslie (1840–1878) was an architect turned bank robber.

Leslie studied architecture at the University of Cincinnati and graduated with high honors. After graduating from college and experiencing the deaths of both his parents in 1867, Leslie closed his architecture business and the family brewery to move to New York City.

While planning a heist of the Kensington National Bank in Philadelphia, Leslie stayed at the boarding house of Mary Coath. There he met her 15-year-old daughter, Mary Henrietta Coath. Leslie married Mary Henrietta Coath after a short courtship. After their wedding, they moved to New York, where they lived the life of a society couple. Mary may or may not have been aware of his criminal activities. Mary returned to Philadelphia after Leslie's death and died in her mother's boarding house of tuberculosis in 1892, at the age of 35.

In New York, Leslie operated as a safecracker for ten years and was one of the most successful bank robbers in New York state. By 1874, he became the head of a gang of bank robbers. However, his involvement in these robberies was not known until after his death in 1878, even though when members of his gang were caught they told police that Leslie had planned the robberies. In 1872, Leslie traveled to Philadelphia. While planning a heist of the South Kensington National Bank, he posed as an IRS agent named George L. Howard.

Leslie spent up to three years planning a robbery. After selecting the next heist, he would obtain, if possible, the building's blueprints. His architectural background allowed him to build scale models of his intended targets. He would sometimes rent a safe-deposit box or open an account at a particular bank, which gave him an excuse to spend time in the building and observe its layout and operation. Other times he would get one of his men hired as a watchman or porter and ask them to obtain this information for him.

Leslie had models of many vaults and safes used in the United States. Before he committed a robbery, Leslie would find out what type of vault or safe his target used. Then, he would spend months figuring out how to open it without the combination. Leslie used a device that he called the "little joker," a wire device inserted into a bank safe's lock in advance to facilitate the robbery. Over time and extended use, the lock's tumblers left dents or marks on the wire that recorded the numbers that made up the combination. Use of this tool required George to enter the bank at least twice prior to executing a robbery, once to place the device and a second time to retrieve it.

When he was certain that the robbery could be committed without him getting caught, Leslie would select his accomplices and explain to them how to execute the robbery. Sometimes he would set up a room to resemble the inside of the target so that his men could practice the robbery while Leslie watched.


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