I bought two of his $25 reference prints - at the time, I was living in small town Georgia and had no access to ANY other b&w prints. I found one of his old barn very useful - it displayed a full range of tones and showed me that I had a lot of work to do. I still look at it sometimes. A second print, of a church, was simply white and black with no midtones.
I almost think he picked the negatives for his reference prints to show off the tonal extremes he got with his Brilliant paper, which he began selling at about the time he began offering reference prints.