Click on thumbnail to view full size. The ads often state that the streets/subdivisions are “restricted”. Based on the ad for May 23, 1908, restricted seems to mean: “stores, saloons, flats, and cottages are barred from our subdivision.”
Classified Ad, May 23. 1908, Chicago Daily Tribune 
Classified Ad – Chicago Daily Tribune, Feb. 28, 1909 
Classified Ad – Chicago Daily Tribune, Sept. 12, 1908. Real estate office address 3643 N. Milwaukee was re-numbered to 4003 N. Milwaukee in 1909. 
Classified Ad, July 16, 1911 Chicago Daily Tribune
4100 N. Leamington Block
Classified Ad – Chicago Daily Tribune, Sept. 17, 1911 
Classified Ad, October 6, 1912, Chicago Daily Tribune
4100 N. Leamington Block