According to "Banshi" written by Yujo, as described above, it seems that Okyo always secretly carried his sketchbook with him and devoted every spare moment to sketching.
前述の祐常著『萬誌』によれば、応挙は常に懐中に写生帖を忍ばせ、暇さえあればスケッチに余念がなかったようだ。