2710 Collingwood was home to New York-born Fred Riefel, superintendent of the New York Central Lines and his wife Alice Riefel in 1918, 1920 and 1921.  They had moved to Chicago by the 1930 Census.  2712 Collingwood was home to New Jersy-born salesman Frederick Campfield, his wife Michigan-born Sarah Campfield and their daughter and public school teacher Olive Campfield in 1920 and 1921.