The early morning October light is something I try not to miss. Most mornings I head for places of quiet refuge where the scene is painted by Mother Nature and the chorus is one of birds and bugs. The other day I decided it was time for a change of pace - and made the industrial riverfront of the Acushnet River my destination. This river forms New Bedford harbor and man has had a heavy hand here. The shoreline is ringed for miles by a stone hurricane dike and the riverbed suffers from industrial pollutants dumped from brick mills in the days before the Clean Water Act. A more gentle hand is at play these days: old mills are becoming artist spaces and condos, the riverbed is being cleaned up and riverfront parks and harbor walkways are coming to life. But much remains to be done.