Tenmei usually brought drawing papers and a portable brush-and-ink case as a painter and when he felt a strong shock on his forehead and an acute pain in his right arm (he expressed it as if a burned metal chop stick was stuck in his right arm) and he took out his brush and a paper, the brush moved very fast automatically and scribbled unknown terms.
画家でもあった天明は画仙紙や矢立を常に持ち歩く習慣がありこの時も例外では無かったが、突然、額のあたりに「ピリッ」とした強い衝動と右手に非常な激痛を感じ（天明の言葉によれば、右腕に焼火箸を突っ込まれたような激痛だったという）、矢立と紙を取り出したところ自分の意思に反して猛烈な勢いで筆が走り意味不明の殴り書きをした。