Thank you for taking the time to reply, Dave, I appreciate it.
Rev. Taylor is described as having one a premium for a display that included the 4 varieties listed. Reading through some of the Michigan Pomological Society proceedings suggest that it was common to have (in addition to having individual variety classes) displays of multiple varieties. There even seems to have been a little bit of a … difference in opinion, shall we say? between the plain apple enthusiasts who’d enter displays of large numbers of different varieties (one gentleman managed 100), and the more commercial folks who insisted that a good orchardist should focus on just a few varieties.
As something of a side note, I also found a flyer he published advertising 50,000 peach trees for sale. I strongly suspect that he was merely brokering those seedlings, using the local railroad. 160 acres seems wildly insufficient for that many trees!