When Ieharu wrote the letter of 'Ryu (Dragon)' with the brush in the practice of calligraphy, he used a whole sheet so extensively that he found no place to put a dot which was a part of the letter.
家治が習字の手習いで「龍」の字を書いたとき、あまりにのびのびと紙いっぱいに書いたので最後に点を打つ場所が無くなってしまった。