One image of an octagonal barn (B.7) from Woodstock, Ontario (not pictured in the books, but listed and described), and one image of an octagonal house (H.18) from Kingsville, Ontario (both pictured and described in the books).

Two images of polygonal houses. The H.18 image is of a house from Kingsville, Ontario, and was built ca. 1856 (this image is in the books), and the H.20 image is of a house from near Bolton, Ontario (this property is only listed and described in the books).