I came across something interesting relating to the great maggid and grammarian Rabbi Yehuda Leib Edel of Slonim (1757-1827), disciple of the Vilna Gaon. There were many editions of his two-volume collection of sermons אפיקי יהודה (editio princeps, Lemberg 1803). As it happens, an edition was published by his great-grandson Rabbi Hersch Edel in Lemberg in 1863. The second volume of this edition contains haskamos from an assortment of prominent rabbis of the day. Some of these notable rabbis include R. Yoseph Shaul Nathanson, Shlomo Yehuda Leib Rapoport, Yaakov Ettlinger, and Zecharia Frankel. There are numerous other approbations; I judge these the most interesting (and famous) for the purpose of this post. I will reproduce three (they've been slightly edited for illustrative purposes, eg, combining Shir's which originally appeared on two pages):
Here is Shir's:
Note that in 1863 it appeared entirely natural to collect these haskamos. But I'm no fool, I know that Frankel's at least would never reproduced in a modern reprinting. But why not the others?
Sure enough, the two volumes were reprinted in Jerusalem in 1999. This is really a deluxe edition. It's got everything. A lengthy and informative introduction, a facsimile of the original edition's title page, a facsimile of a manuscript in the author's hand, a letter from the author (with mistaken ID, see below), and haskamos:
It's interesting that not a single haskama from the Lemberg 1863 edition is reproduced, and it's not as if they weren't aware of the edition. It mentions the editor, and even cites the haskama from R. Ettlinger (footnote 19):
It's enough to make you go "hm." Interestingly, the letter by the author which is reproduced above is addressed to Rabbi Moshe Chefetz, which the editor misidentifies as the author of Maleches Machasheves. The aforementioned rabbi died in 1711 (see here). The Chefetz's (Hefez Gentili) were a prominent Italian rabbinic family, and likely the Rabbi Moshe Chefetz this was addressed to was the rabbi of Gorizia who died in 1798. I assume he was a grandson or even great-grandson of the author of Maleches Machasheves. He was also, interestingly enough, the rebbe of Isaac Samuel Reggio (Yashar).
Another interesting detail worth mentioning is that Rabbi Yehuda Leib Edel, talmid of the Gra, maggid of Slonim, euphemistically mentions Moses Mendelssohn in Afike Yehuda. In discussing theories of authorship at the very beginning of his second sermon (volume 1), he writes the following (pg. 13 in the hbooks pdf):
That is, he writes that no two authors write alike, and in the brackets he gives two sources which presumably discuss this [ ר"מ פ' חלק והאשכנזי בהקדמתו] -- that is, the Rambam in Perek Helek and "the Ashkenazi in his introduction," meaning Moses Mendelssohn in Nesivos Shalom, the introduction to the Pentateuch.
I think it's not too hasty to say that they missed this one.