Publishing editorial work on arXiv
arXiv has guidelines for how to publish a translation of someone else's work, and I assume this would be similar.

You, as editor, should submit with your name in the "Author" field, but include the original author's name in the title; e.g. "Lise Meitner's Notes on Uranium Decay".

Of course, there is a separate issue of making sure that either the copyright has expired, or that you have permission of the original author (or their estate), which is also mentioned on the link above.