III The Adventure of the Cheap Flat So far, in the cases which I have recorded, Poirot’s investigations have started from the central fact, whether murder or robbery, and have proceeded from thence by a process of logical deduction to the final triumphant unravelling. In the events I am now about to chronicle, a remarkable chain of circumstances led from the apparently trivial incidents which first attracted Poirot’s attention to the sinister happenings which completed a most unusual case. I had been spending the evening with an old friend of mine, Gerald Parker. There had been, perhaps, about half a