William Howard was indexed!!!
It's either a personal visit for onsite research, hire a researcher, inter-library loan or the FHC.
The Family History Center Library Catalog showed the following film and description in this Ontario category (Petitions for land grants and leases, 1791-1867 - Upper Canada. Executive Council) that seemed to match what was indexed for William Howard:
C-2051 Vol. 233A, bundle H-15, petition no. 76 -- Vol. 235, bundle H-17, petition no. 110 1825-1833 FHL US/CAN Film 1630608
So next summer this will be the first film ordered when we're back in Michigan.