anchor: I must say I think you might have given me a hint. 138 "Perhaps, mon ami, I did not do so, just because he was your old friend." I was rather disconcerted by this, remembering how I had busily passed on to John what I believed to be Poirot's views concerning Bauerstein. 
positive: Poirot had certain views concerning someone called Bauerstein.
negative: He said that he had given me a hint because the man was my enemy.