I THOUGHT SHE WAS HELPING A STRAY—UNTIL THE OWNER STARTED SCREAMING
I only stopped because of the green coat. It was draped over something small, curled and shivering, right at the base of a scraggly tree wedged between a lamppost and a parking meter on Tremont Street. At first, I thought it was a bundle of clothes or one of those discarded duffel bags Boston seems…