Murder by Death

Just finished reading the first chapter, A for Arsenic.  Of course, about midway through I read something that struck me as 'not quite right' but do you think I can find it now?  Ah, well, I do remember it wasn't anything huge, just one of those things that snags the attention for a brief moment.

This is probably the chapter (this is a re-read for me) that had the least new information for me.  I've read about most of the cases and the Marsh test in various other books, but it still succeeds at fascinating me, and even though no one has ever (to my knowledge) wanted to poison me, I find the idea of always having a bit of charcoal at the ready compelling.  You never know; one day I might just push someone over the edge.