most newtown junior district clubs were absorbed by souths. the newtown district encompassed the old marrickville council area + earlwood saints and hurlstone park, even though the latter two are suburbs in the old canterbury council. earlwood went to st george district and hurlstone park are extinct. i'd say erko would be within newtown's football boundaries back in the day too as it's a neighbouring suburb, but there was never a club called Erskineville as far as i can recall.
anyway, the district gentrified which is the reason newtown eventually disappeared, as well as most of the clubs too. greeks and yugos (serbs/croats/maceos), then vietnamese, and now the hipsters, all had/have little interest lacing up a footy boot and getting physical.