a1892 W. Whitman (1978) III. 671 One of the first desiderata..is a set of..sound-marks attached to letters..each mark belonging to that specific sound.
1953 H. Read I. viii. 144 The caesura is..the breaking of the rhythm into sense words of different length from the sound marks.
1978 Jan. 29/3 We cannot shut our earlids; awake, we are always open to..the old soundmarks we remember and cherish.