premise: Wavy <mask> , feather like patterns , rosettes of indefinitely floral nature , birds either singly or in stylized rows , animals in solemn frieze bands ( see Plates 11 - 12 ) - all these turned up in the more developed fabrics as preliminary signs that the potters were broadening their gaze .
hypothesis: the proper context for <mask> here should be a length (straight or curved) without breadth or thickness; the trace of a moving point