I live around Valley Avenue/Domino Lane and 2 guys that fit your description knocked on our door about 2 weeks ago on a Saturday afternoon, with the same spiel. Very polite, but very persistent. Nobody asked for water, though. FInally had to just say very insistently that we weren't interested and closed the door. Last summer we had quite a few of these teams knock on our door, too. One thing I notice is that one guy ALWAYS stands right outside the door and the other ALWAYS stands at the bottom of the steps.
She understood history, memory, record.
And I will not forget her, a common housewife, who rose above her nature.