Just before tea, I strolled down to tell Poirot of the new disappointment, but found, to my annoyance, that he was once more out. 
Poirot has returned an hour later so that I can tell him the news.
mnli hypothesis: Poirot has returned an hour later so that I can tell him the news. premise: Just before tea, I strolled down to tell Poirot of the new disappointment, but found, to my annoyance, that he was once more out. 