Your experiences with "Herein"

I searched through all my university essays on the computer, looking for files containing the text "Herein". Two essays had it.

Disappointingly, in the first, I'd written a sentence using the word "Therein", which does contain "herein" but also does does count.

Even more disappointingly, the other result was in a work I'd quoted in an essay, rather than something I'd written myself. Furthermore, the word in the quote was "wherein".

So the answer is no.

I can certainly imagine using it, especially in business-type letters. I can't imagine using it in chatty language on ILE or in fiction. Someone should do a search for uses on ILE! (Probably find me using it, likely as not.)

The lawyers who throw in a lot of unnecessary hereins, thereofs and therefors (often incorrectly) are usually also the same ones who add "Esq." to their own signatures.

It makes me think of leases. I read the lease when I move into a new apartment (after I've already moved in of course--if I read it before, I woudln't want to sign it, and would have nowhere to stay).