June 13, 1967 – Efforts to correct the sinking north wall of the Monadnock building are finished. After a real estate investment group headed by Carroll H. Sudler, purchased the building for more than two million dollars, it was discovered that the 1891 building is sinking. For two months, according to the Chicago Tribune, 31 pipes, each of them 14 inches in diameter, have been sunk under four supporting piers of the north wall and then filled with concrete. On this date the work is completed. On the other hand, Jackson Boulevard on which the narrow north face of the Monadnock sits, is a mess, “slumping badly in sections,” according to the Tribune as a result of excavation work for the new Federal building that is being constructed directly across the street from the Monadnock.