... by publishing his own festschrift, the collector means that he doesn't care to remain anonymous.
This needs a vigorous and very strong correction.
The honoree of the festschrift not only didn't publish it, he
had absolutely nothing to do with its publication, and even further than that, he was not even aware that such a book was going to be published until after it went to print,
nor did he see any of the articles within the book until he was handed a copy in Taormina. So he was in absolutely no position to address what Kagan might have written. A festscrift is usually arranged in a cloud of great secrecy.
Similarly in the case of the
Burnett festscrift, also published in Taormina,
Burnett only became aware of its existence two days in advance of its presentation.