A lot depends on being on the spot first thing, and that's where Mr. Poirot's had the start of us. 
It is not about who gets there first at all, and Mr. Poirot arrived last.
mnli hypothesis: It is not about who gets there first at all, and Mr. Poirot arrived last. premise: A lot depends on being on the spot first thing, and that's where Mr. Poirot's had the start of us. 