and they together established Hill & Knowlton of Cleveland. Hill moved to New York City in 1934 to open a new Hill & Knowlton office. Knowlton remained in Cleveland and operated the original location until his retirement in 1964. Hill served as chairman and chief executive until 1962, but remained on the firm's policy committee, and continued to go into the office until shortly before his death in 1977.

The company represented the dairy industry during congressional debates on margarine regulation