Several years of annual reports from the Women's Canadian Historical Society of Ottawa, the precursor to the Historical Society of Ottawa, are available via the Internet Archive:
Women's Canadian Historical Society of Ottawa: Annual Report 1910-11
Women's Canadian Historical Society of Ottawa: Annual Report 1913-14
Women's Canadian Historical Society of Ottawa: Annual Report 1914-15
Women's Canadian Historical Society of Ottawa: Annual Report 1915-16
Women's Canadian Historical Society of Ottawa: Annual Report 1916-17
Women's Canadian Historical Society of Ottawa: Annual Report 1917-18
Women's Canadian Historical Society of Ottawa: Annual Report 1918-19
Women's Canadian Historical Society of Ottawa: Annual Report 1919-20
Women's Canadian Historical Society of Ottawa: Annual Report 1920-21
Women's Canadian Historical Society of Ottawa: Annual Report 1921-22
