who was The ChildCatcher?

‘In did come the strangest figure! A wandering fellow with a gipsy coat of red & yellow. And he himself was tall & thin. Lips where smiles went out & in. There was no guessing his kith & kin! Quoth one: “It’s as if my great-grandsire, Starting up at the Trump of Doom’s tone, had walked this way from his painted tomb!” Who was this Walking Cadaver who stole away all the children?