89X) This piece is mentioned in Sullivan/DeWitt within the description of WHH 1840-2. "Commenced.17.June.1825. Completed.17.June.1843." The date of June 17, 1843 was when formal completion ceremonies were held. It included president Tyler and dignitaries. The actual placing of the last stone took place on July 23, 1842. I have stuck with not including holed pieces, so that is why I am showing this piece separately. It appears to me that it might be the rarest of the four varieties. This is the only one I have found. Like HK2-4 it probably does not exist unholed, but if anyone finds one, let me know.