Issues of the Ottawa Free Press from 2 January 1904 to 30 December 1915, 2,298 in all with 30,596 pages, are just added to the British Newspaper Archive. At present, there are gaps — 1905, 1910, 1912, and 1914.
The paper was established in 1869 and amalgamated (taken over) in 1916 by the Ottawa Journal. The British Library holdings, the source for the BNA, date from 1903.
The Ottawa Public Library has earlier issues on microfilm and there are a few digitized by Google and available on MyHeritage. The catalog entry from Library and Archives Canada returns an error. I enquired to LAC and the automated response was that “it can take up to 4 months to respond.”
A tip of the hat to Claire Santry from Irish Genealogy News who alerted me to the BNA addition.