 He served on the Chicago Plan Commission in various capacities into the 1930s and developed a substantial private practice and a national reputation as a city planner.Burnham, who largely retired from active practice after 1905, other than for his work in Chicago, directed applicants to Bennett, who, with partners William E. Parsons (1872–1939) and Harry T. Frost (1886–1943), served as a planning consultant to many cities large and small.In the plan for Chicago, Burnham and Bennett created a working document giving substance to the City Beautiful philosophy.