Jack Bell sent out a note today that he discovered this 10" Brooke bolt recently in a private Virginia museum. In his book, a period photo of one is shown on page 71. He had been unable to find one when he did his book so this is considered a lost projectile recovery! FYI, the measurements are 9.86" by 10.98 inches. He guesstimates it weighs 220lbs. Ouch!