"Doeff-Halma" was believed to be written by Hendrik DOEFF, the curator of Dutch trading house whose stay in Dejima of Nagasaki was prolonged because his native country was under the rule of France, so that he could not go home.
『ドゥーフ・ハルマ』は、祖国がフランスの支配下にあったため帰国が叶わず長崎の出島滞在が長期化していたオランダ商館長ヘンドリック・ドゥーフの著とされる。