 In January 1858, the first masonry building in Chicago to be thus raised—a four-story, long, 750-ton (680 metric tons) brick structure situated at the north-east corner of Randolph Street and Dearborn Street—was lifted on two hundred jackscrews to its new grade, which was higher than the old one, “without the slightest injury to the building.” It was the first of more than fifty comparably large masonry buildings to be raised that year.The contractor was an engineer from Boston, James Brown, who went on to partner with Chicago engineer James Hollingsworth; Brown and Hollingsworth became the first and, it seems, the busiest building raising partnership in the city.By the year-end, they were lifting brick buildings more than long, and the following spring they took the contract to raise a brick block of more than twice that length.