I think I found a picture of Brendan O'Briar Hill. It is on the front page of a newspaper in Ohio dated in 1987, and the article covers parts of three pages on Mr. Johnson and his Dexters. The paper is very fragile and falling apart. so I need to take it and have it carefully copied and then reduced to a JPG or something. Meanwhile I was able to copy the front page though it is a poor copy. I looked up Mr. Johnson's herd records for this time period and the black bull, Brendan O'Briar hill was the main sire. He is in a high percentage of traditional pedigrees so thought this is a great find. I sent the photo to Mr Johnson to see if my guess is correct.