Charles Edward Fitton, O.L.S., D.L.S. (1858-1937) articled to Cannon F.W. Armstrong, P.L.S. in Orillia. Mr. John McCormick Watson, O.L.S. (1870-1955) articled to Mr. Peter Burnet, O.L.S. in Orillia and joined the survey practice of C.E. Fitton, O.L.S., D.L.S. in 1897. Mr. Watson formed a partnership with Allan G. Cavana, O.L.S., D.L.S. who was commissioned in July of 1887 and died March 17, 1946. The firm Cavana and Watson practiced in Orillia for many years. Mr. Ernest Leopold Cavana. B.Sc., O.L.S., P.Eng, MEIC (1893-1971) articled to his father A.G. Cavana and practiced in the Orillia area until the mid 1960's.

Mr. James D. Dearden, O.L.S., P.Eng was commissioned as an Ontario Land Surveyor in 1954 and worked in the Orillia area throughout his career. Mr. Dearden married Elinor Cavana, the daughter of E.L. Cavana. Mr. Dearden and Mr. Cavana shared office space on West Street in Orillia. In 1964 James D. Dearden and John A. Stanton formed the partnership "Dearden & Stanton" which was later incorporated as Dearden and Stanton Ltd. Mr. Dearden retired in 1976. J.Chester Stanton articled to John A. Stanton and received his commission in 1985 and became a partner in the firm. John A. Stanton retired in 1994. The firm is now operating under the direction of Mr. J. Chester Stanton, B.Sc., O.L.S., C.L.S. and Mr. Jeffrey J. Marshall, M.A.Sc., P.Eng. Dearden and Stanton retains notes and records dating back to the mid 1800's for Orillia and surrounding areas.