The 4th Parliament of Upper Canada was opened 1 February 1805. Elections in Upper Canada had been held in May 1804. All sessions were held at Parliament Buildings of Upper Canada in York, Upper Canada. This parliament was dissolved 21 May 1808.
This House of Assembly of the 4th Parliament of Upper Canada had four sessions 1 February 1805 to 16 March 1808:
References
4th Parliament of Upper Canada Wikipedia(Text) CC BY-SA