Black ink brush writing by Zen 禅 priests, as well as by laymen who practiced Zen meditations and wrote Buddhist sermons, or hōgo 法語. These laymen also wrote poetry, geju 偈頌, and certificates of attaining spirited enlightenment, inkajō 印可状. Some liked to study and explain the history of the names of other priests, azagōsetsu 字号説. Others studied character writing by Zen priests to determine whether or not they were beautifully executed. The writer's personality or morals were of no account in the evaluation of the skill in writing. Used in a tea room *chashitsu 茶室 of the hut style, excellent script—both ancient and medieval—was highly revered. The text *Nanbōroku 南坊録 (1593-1691)—which conveys the spirit of tea, cha-no-seishin 茶の精神, of Sen no Rikyū 千利休 (1522-91)—states that black ink brush writing is most appropriate for scrolls hung in a tea room. One highly valued piece is the black ink picture by a head priest at Daitokuji 大徳寺 in Kyoto, which is referred to as a Daitokuji object, daitokuji mono 大徳寺物.