The paper by d Amecourt was published in 1863 yet Liberatore credits d Amecourt with coining the word some two years earlier I am no longer thinking that La Conq ete de l air par l h lice Expos d un nouveau syst me d aviation is the holy grail and that the source is some other correspondence of d Amecourt s perhaps with one of his contemporaries or some other worthy I still feel that the paper has served as a clue of sorts through Wolf s translation to getting closer to the truth