Found these references on the internet:
Scavenger 1.. The 'scaffie' was a dustman or street sweeper
2. Worker in a jute mill picking up loose bits of material from the floor
Second ref:
In 1901 the cotton industry was the largest employer in Atherton, with 33% of the workforce in the spinning mills, over 60% of whom were women. Census records reveal long-forgotten occupations, which now sound arcane, but were once in common parlance on the streets of Atherton: piecer, scavenger, doffer, slubber, doubler and carder.
It would seem therefore that your scavenger may have been employed in the same cotton mill as the fustian cutter!!!