Everyone's thoughts thus went in the same general direction. It was when they ended up with Polly Simpson that several individuals remembered a terrible but significant detail: Polly too had eaten from Ralph Tucker's trail mix and not for the first time, as a matter of fact. For hadn't she also dipped into it on their very first outing when Ralph, in a moment of bonhomie that was not repeated, generously offered the mix round the tour coach in place of afternoon tea on their way back to Cambridge after a long day looking at properties in Norfolk? Yes, she had. She alone certainly had. So it was possible that she had been fingered for murder, with Ralph Tucker merely an unfortunate casualty who'd had to be done away with as well.
This made more than one person watch Polly with some concern, waiting for the least sign that she too was about to collapse from whatever it was that had taken Ralph from them. Someone even quietly suggested that she might want to retire to a lavatory and do what she could to upchuck just in case. But Polly, who didn't seem to understand the implication being made, merely grimaced at the suggestion and went on taking her pictures, albeit noticeably subdued from her usual ebullience.
Death by trail mix naturally brought up the question of poison in people's minds. And that made people ask themselves how someone was supposed to get a poison in Cambridge. You couldn't just walk into the local pharmacy and ask for something fast-acting, untraceable, and non-messy. So it stood to reason that the poison in question had been brought from home. And that led people into thinking more seriously about Noreen Tucker and whether her devotion to dear Ralph was all that it seemed.