The Collaborative International Dictionary of English v.0.48:

Scantle \Scan"tle\, v. i. [Dim. of scant, v.]
   To be deficient; to fail. [Obs.] --Drayton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Scantle \Scan"tle\, v. t. [OF. escanteler, eschanteler, to break
   into contles; pref. es- (L. ex) + cantel, chantel, corner,
   side, piece. Confused with E. scant. See Cantle.]
   To scant; to be niggard of; to divide into small pieces; to
   cut short or down. [Obs.]
   [1913 Webster]

         All their pay
         Must your discretion scantle; keep it back. --J.
                                                  Webster.
   [1913 Webster]