AZ Christian thanks. I'm rewatching ( again) Series 3 Ep 6. Have re watched all of series 3 in the last two days.
Mrs Bartlett does change her story, but I can't find that scene. Anna goes to Bates in EP 5 to describe how she'd talked to Bartlett and to tell him about Bartless saying " I saw Vera with a halo".
But the next episode is Bates being released. There is no in between scene with police, or lawyer saying "yes, the halo is a common effect of arsenic, therefore Vera Bates must have being consuming it for a long time and this proves his guilt" ( or something to that end).
Susan Sunflower = this is info I've poured over but we already know Anna goes to see Bartlett and Bartlett tells her for the first time, of a halo effect, and scrubbing of the fingers. In the Bartlett scene, this is the first time it's said out loud - that Vera had a halo and scrubbing the fingers.
And yes, the Wiki info is that, the halo is a side effect of arsenic. But NONE OF THIS IS KNOWN by the people in Downton. This is extra info for us viewers.
I am looking for the scene, where the halo, and its' proof that Vera was ingesting arsenic for a while, is explained. Bartlett only mentions it, and Anna thinks it's weird. So does Bates. But I'm looking for the key scene where someone like pathologist, doctor etc, explains WHY this would prove Bates is innocent ( because it proves long time arsenic poisoning.
Like I said, its making me potty. Thanks for your input, and I've already watched each of these scenes a dozen times. Episode 5 is where Anna goes to Bates to inform him of what Bartlett said about the halo and finger scrubbing. At that point, with Anna sitting across from Bates in jail, neither of them know the halo is a long term arsenic effect.
I need to know who says it!