Unless you're a submarine, "surface" is not a verb.
https://www.merriam-webster.com/dictionary/surface#dictionar...
> : to come into public view : show up
> letters that have recently surfaced
That said, I don't love this non-education jargon usage for its passive-voiced-ness. The letters didn't "surface" of their own accord. Somebody found them, decided that they were noteworthy, and made the choice to bring them into the public view.
Also have read the term “seam” dozens of times by now, when previously I saw it maybe once or twice over years. Very abstract term.