The Following information is all from the Wellington County Museum and Archives, you would need to contact them for information about how to access the records
Harvey Cottage: image
Ink drawing over pencil on paper by Scottish-Canadian artist Alexander Dingwall Fordyce (1816-1894) entitled "Harvey Cottage (on the Grand River) near Fergus: the residence of GEORGE WILSON Esq:", signed and dated lower left, "A.D.F. / del' / 30 July / 1835"; it is a forest landscape showing both deciduous and coniferous trees, as seen from across the Grand River; at centre is a single-storey log dwelling, possibly with porch; sawn logs lay on the ground between the house and the river; title inscribed along river in foreground.
https://wcma.pastperfectonline.com/webobject/02C94CD5-9086-43F4-B367-753235791855
Also
https://wcma.pastperfectonline.com/webobject/EEFE57B4-3FC9-41A2-B33C-111086337557
Pencil drawing on paper by Scottish-Canadian artist Alexander Dingwall Fordyce (1816-1894) entitled "Harvey Cottage", ca. 1840; it is a landscape with one and a half-storey log house at centre, likely near Fergus, Ontario; the house has a front porch, a chimney at each end, a rear addition, and a large back porch; forest in background; path or road through forest at left; signed "ADF" beneath tree trunk at lower centre; handwritten in ink on reverse of drawing "Harvey Cottage".
Also
https://wcma.pastperfectonline.com/archive/7812E890-C1D0-45C8-B682-194636044761
Wilson family, 1702-1988, part 1 of 2: Guy Saunders fonds, A2002.54, Series 23.
Portrait of an Elderly Man, George Wilson??
https://wcma.pastperfectonline.com/archive/4E6CC99D-21C1-4DC0-A742-904213224820
Book: Fergus: A Scottish Town By Birthright on Google Books and other places
Also: https://www.familysearch.org/tree/person/details/L4JV-PYP
It looks like the correct person, but the wrong death place as is seen on multiple Ancestry trees