How is David greeted at the house?

David was greeted by a man in a first story window holding a gun and ready to fire.

I was in two minds whether to run away; but anger got the upper hand, and I began instead to rain kicks and buffets on the door, and to shout out aloud for Mr. Balfour. I was in full career, when I heard the cough right overhead, and jumping back and looking up, beheld a man's head in a tall nightcap, and the bell mouth of a blunderbuss, at one of the first-storey windows.