At first I thought there was a superfine
Persuasion in his face; but the free flow
That filled it when he stopped and cried, "Hollo!"
Shone joyously, and so I let it shine.
He said his name was Fleming Helphenstine,
But be that as it may;—I only know
He talked of this and that and So-and-So,
And laughed and chaffed like any friend of mine.

But soon, with a queer, quick frown, he looked at me,
And I looked hard at him; and there we gazed
In a strained way that made us cringe and wince:
Then, with a wordless clogged apology
That sounded half confused and half amazed,
He dodged,—and I have never seen him since.

Edwin Arlington Robinson

http://www.poemhunter.com/poem/fleming-helphenstine/