never materialized. The Pre-Emption House was constructed in 1834, as the Settlement became a stagecoach stop on the road from Chicago to Galena. The Pre-Emption House was the first hotel in DuPage county. After DuPage County was split from Cook County in 1839, Naper's Settlement became the DuPage county seat. In 1843, the Illinois General assembly passed an act to incorporate the Naperville Cemetery Association. In 1855, Sybil Dunbar came to Naperville as its first recorded black female resident; she died in 1868 and was buried in Naperville Cemetery. Naper's Settlement was incorporated as the Village of Naperville in 1857, with a population of 2,000. The county seat distinction was lost in 1868 to Wheaton. On August 5, 1873, a train crashed on the CB&Q tracks about east of Naperville. Conductor Williams, who was operating a passenger train, was informed of a freight train occupying the line, but for some reason increased his speed, and upon rounding a curve, ran into a freight caboose. A conductor sitting in the caboose and a cattle drover were instantly killed. The passenger train fireman and engineer jumped out of the locomotive just in time to save their lives. In 1887, Peter Edward Kroehler established the Kroehler Manufacturing Company's factory in Naperville along the Chicago, Burlington & Quincy tracks. In 1890, reincorporation as a city occurred. After Professor James Nichols donated $10,000, Nichols Library was built, and dedicated in 1898. In January 1907, Edward Sanatorium (now Edward Hospital) was opened by Eudora Hull Spalding. It used the "open air" treatment for tuberculosis patients. In 1908, the Chicago YMCA stated that Naperville was too small for its own YMCA building, but Peter Kroehler led a campaign to build one. In January 1910, Kroehler was the mayor of Naperville and its richest resident. But rumors in Naperville relating to a relationship between him and his stenographer caused him to resign as mayor. After his resignation he retreated to his Binghamton, New York factory. The YMCA was opened on March 26, 1911, and included the first swimming pool in DuPage County. In February 1920, Edward sanatorium burned to the ground, and cost $500,000 to rebuild. On April 26, 1946, Naperville was the site of a train disaster. Two Chicago, Burlington and Quincy Railroad trains collided "head to tail" on a single track just west of the Loomis Street grade crossing. The accident killed 45 and injured approximately