the origin of trick-or-treating may have also come from celtic tradition. poor children in britain and ireland went door-to-door
on all hallows Eve and received food in exchange for the promise of praying for the giver's dead relatives on all saints day.
this practice was know as going-a-souling while that may be the start of it , that tradition did not make its way to america.
here, trick-or-treating may have started with children trading songs for treating the1910s, according to old newspapertexts.