Atenon in which the pinhole does not alignwiththat in the cheeksor sides of the mortise, but is kept nearer the inside of the mortised beam so that when the pin is driven it has todrag the shoulders of the tenonclose against the mortised beamorpost. This is apt to cause difficulty in the proper taking down of old work which is to be set up again, as the oakpins may be found so bentthat they cannot be “drifted,” or driven out. (Isham, 1928)
