Oil on canvas painting titled 'Chaff' by Edmund Blair Leighton (1852-1922). Feel free to right click and save any of 'my' pictures. I'm quite certain, judging by the perspective, that the artist used photographs for reference if not for copying.
Re short quants, the Dutch often have, in English, 'shove sticks' that they use to help work their barges through locks. It would seem quite likely that Norfolk wherrymen working the Upper Waveney locks might have done the same.