Alternity

Yes, Frank. He's right in what he says about yarrow's having calming and mood-elevating effects when taken in tea. And thank goodness he warns off pregnant women and those still nursing, though he ought to have said something about using caution if treating children, especially as it's children we most wish to comfort when they are distraught by near encounters with Dementors.

And he omits to mention that people with low blood pressure may experience a dangerous drop in of the sort that causes fainting and falls--even heart stoppage in rare cases (or in cases of overdose). And he might have explained in straightforward English that its coagulant properties mean that it encourages clotting of the blood--quite useful in some situations, fatal in others.

But it's not his sins of omission I most unhappy about. Did you not note that he manages to suggest poisoning once again? Quite cleverly and by indirection. Note, he says, its similarity in appearance to fool’s parsley, or poison hemlock, and be wary of this when harvesting yarrow. Which is exactly as much as to say: here's a picture that will help you find a new poison, if it's poisons you're interested in finding.

That. That is the work of a wolf in sheep's clothing.