This may be the most frequently cited specimen in Edward Hitchcock's collection, known for its startlingly clear, perfectly formed Brontozoum sillimanium tracks and mud veins. Because the spectacular prints were on the underside, this specimen had already lain in a sidewalk in Middletown, Connecticut, for sixty years before it was noticed by Dr. Joseph Barratt. He sold it to Hitchcock, who considered it "the gem of the Cabinet." Pleasant relations between the two men soured as Barratt became increasingly disagreeable and aggressively insistent toward Hitchcock when the latter did not accept his theories about how and when the tracks were created. Sadly, Barratt's mental health declined over the years until he was finally committed to the Connecticut Hospital for the Insane in 1880.