A follow-up to my blog post of August 26. The owner of the Hall House sent me a few more pictures of the bricks, and it appears to me that they are of consistent color with the white brick produced at the Zeeland brickyard in the 1870s.
The images below show the brick in detail, with the builder’s initials “H. H.” for Hobart Hall.
The image that I had dated to the 1880s or 1890s turns out to be from 1900, and the man with the horses was a hired hand.