Following her marriage in 1897, Chadwick began her largest, most successful con game: that of establishing herself as Andrew Carnegie's daughter. During a visit to New York City, she asked one of her husband's acquaintances, a lawyer named Dillon, to take her to Carnegie's home. In reality, Chadwick visited Carnegie's housekeeper while ostensibly trying to check credentials. When Chadwick came back, she dropped a paper. Dillon took it up and noticed it was a promissory note for $2 million with Carnegie's signature. When Dillon promised to keep Chadwick's secret, she "revealed" that she was Carnegie's illegitimate child. Carnegie was supposedly so wracked with guilt that he showered huge amounts of money on her. Chadwick also claimed that there was $7 million in promissory notes tucked away in her Cleveland home, and she was to inherit $400 million upon Carnegie's death. Dillon arranged a safe deposit box for her document.