Limey: I don’t think being Chotzetz Bifnei Hatumah helps here. Because he’s still in an Ohel. The bag isn’t Mevatel the Ohel Zaruk that’s Meivi Es Hatumah on him.
Ferd: I said he didn’t publish it. He didn’t. Look at the first few pages. Someone else had access to his letters and published those that he thought were useful (he didn’t publish all of them; in fact, some of them he only published parts of). I have heard that R’ Elyashiv reviewed the first 3 Chalakim after they were published but I don’t think I saw that written anywhere. The fourth Chelek, the one that came out shortly after R’ Elyashiv passed away, probably could not have been reviewed by him. Also, look at the first Shailah (from the Steipler) in the fourth Chelek. The publisher clearly had a sense of humor.