What does the word Trebly mean?

Usage examples for Trebly

  1. One of the bits of paper held hairpins; another a side- comb; and another, a bit of trebly folded paper, proved to be an envelope- the envelope of one of the letters that he had sent to her at North Ride Cottage. – The Devil's Garden by W. B. Maxwell
  2. One, sees her at the work,- pale, flinty; no faces; trebly the terrific woman in her mild way of doing the work. – The Complete Project Gutenberg Works of George Meredith by George Meredith
  3. Difficult as it had been for David and Jean to make their way to the point in the woods which they had just left, the return was a trebly laborious journey. – Grace Harlowe's Golden Summer by Jessie Graham Flower