 His sons Aaron Ross and Norman Rosenfeld worked for the company and later took over management and ownership upon Harry's death in 1973.In 1932, the flagship store was moved to the corner of Woodward Avenue and Montcalm; by 1952, Sibley's moved its corporate offices to the Fox Building and remained there until 1977.Meanwhile, the Sibley's chain grew to more than 38 stores at its peak, throughout Michigan and into Ohio.