^ ab"Mapping Toronto's First Century: 1787-1884". Toronto Public Library. Retrieved 2013-08-21. Vernon Bayley Wadsworth (1842-1940) and Charles Unwin (1829-1918) were prominent surveyors in Toronto in the latter half of the century. Both were pupils of J.S. Dennis. They were in partnership from 1868 to 1876 when Wadsworth left the firm to work for the London and Canadian Loan and Agency Company. Unwin also held the position of an Assessor for the City from 1872 to 1905, when he was appointed City Surveyor. The firm from which he retired in 1896, Unwin, Murphy, and Esten, is still in existence today.
^"Wadsworth family fonds". Archives Canada. Archived from the original on 2013-09-18. Vernon Bayley Wadsworth (1842-ca. 1940) was a lawyer and manager of the London and Canada Loan and Agency Company in Ontario during the late nineteenth and early twentieth century.