On September 23 Library and Archives Canada launched it’s new data base “Upper Canada Land Petitions (1763-1865)". The data base contains more than 77,000 references to petitions for grants or leases of land by individuals who lived in Upper Canada (Ontario after 1867) from 1863 to 1865. This data base will give you a reference to the microfilm that contains the petition.
For example, a search for Hillman results in six names of which George Hillman(great great great grandfather), and John Hillman (great great grandfather) are listed.
Name: HILLMAN, George
Bundle: H 4
Reference: RG 1 L 3
What remains now is getting my hands on that microfilm.