[1] He created many dramas which were broadcast during the early days of radio, and was the art director of Hart House Theatre, Toronto, Ontario.

[5] Instead of making a career as an architect, Denison began working as the art director of Hart House Theatre in Toronto in 1921.

Denison soon began to write comedies, some of which were conceived at his summer home in what would later become Bon Echo and performed in the Tweed Playhouse in Tweed, Ontario.

The Romance of Canada, a series of historical plays written by Denison, were broadcast as radio dramas in 1931 and 1932 by CNRV.

[6] In 1959, he donated his family property to the Province of Ontario for development into Bon Echo Provincial Park.