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Use "jack-staff" in a sentence
"Fastening one end of the string to the jack-staff and the other to the steps at about the proper height, the ribbon was tied in the centre of the string, and the black man and myself stood back five feet on either side, and at a given signal were to come forward and strike at the ribbon."
"The young man who had urged the necessity for silence was groping round it, fumbling with the sharp bow, in which he fixed a short pole or "jack-staff," with some object -- at present no one could discern what -- on top."
"On righting it they found that the jack-staff had been dislodged."