When Rav Hutner was a young man, he wrote a sefer called "Toras HaNazir" on the Rambam Hilchos Nazir. It shook the Torah world with its depth and profundity on a topic that was not the basic fare of most lamdanim. He requested a haskama on the sefer from his Rebbi, Rav Kook ztz"l.
Here is his letter:
Lo and behold - the haskama was printed in the first edition but in later editions it was omitted!! When I go to the Beis Medrash in my neighborhood and open up the "Toras Ha-Nazir" the haskama is missing.
So, for posterity - here it is!!
