Usage examples "fro":
- There was disturbance among the fighting pairs; some staying with each other, some changing- running to and fro- charging at odd angles. - "Son of Power", Will Levington Comfort and Zamin Ki Dost.
- Herr von Osternau had begun to pace the room to and fro as he spoke. - "Quicksands", Adolph Streckfuss.
- The children had been packed off to a neighbor's house before, and he himself had been to and fro all night and was tired out- to the priest's house at Homerton, to the doctor's, and to the parish nurse. - "None Other Gods", Robert Hugh Benson.