The English accused the Irish of taking bread from their mouths and driving down wages. Gang warfare between English and Irish navvies became commonplace.
Note the similarity of the assailants dress to that of the assailants in this image of the Whiteboys, who used violence to defend the interests of tenant farmers and who were active in Ireland during the 1780s

Probably Clarence dock Liverpool (opened September 1830) This picture comes from the Illustrated London News, 1st October 1842
