The Lake Scugog Historical Society and OurDigitalWorld have digitized more than 20,000 pages of Port Perry area newspapers dating from 1857-1933. The newspaper site was officially launched just in time to celebrate Port Perry, Ontario’s 150th anniversary! Now online:
Ontario Observer (1857-1873)
Port Perry Standard (1867-1868)
North Ontario Observer (1873-1919)
Port Perry Star (1907-1933)
Likely of broader interest is the Digitized Ontario Scrapbook Hansard, a collection of 10,000-15,000 newspaper clippings that provide substantially verbatim transcripts of Parliamentary debates and committee proceedings.
If your looking for other dates consult the Debates (Hansard) of the Legislative Assemblies of the Province of Canada and of Ontario, a pdf from the Archives of Ontario.