Here’s a reference guaranteed to waste the time of a researcher. It’s from the Bibliotheca Hagiographica Latina:
This is some miracle material associated with the abbey of Brauweiler. But… what is “Archivo Pertzii”?? I did find out, but it was enough work that I thought I’d put up a blog post, in case I forget and need to google it again.
At the moment, a google search points you right back to the BHL, seemingly the only publication in all history to know of this source.
The italics on Archivo are the key; clearly it’s the abbreviated title of a journal. I know that German publications often referred to the editor of a journal, especially if he was someone famous, so “Pertzii” is probably the editor. But you may search for “Archivo” as long as you like. It’s bad enough with Google. Imagine the bafflement of a 20th century researcher without it!
I tried “Pertzius”, and kept reading results, and this gave me what I needed. Apparently this is Georg Heinrich Pertz, whoever he might have been.
I found that he edited the last volume, volume 12, of the “Archiv der Gesellschaft für Ältere Deutsche Geschichtkunde zur Beförderung einer Gesammtausgabe der Quellenschriften deutscher Geschichten des Mittelalters”. So the “Archivo” is just a Latin ablative of the real name “Archiv”. The BHL, in translating it into Latin, managed to obscure the sense completely.
Just to make it better, Pertz only edited some volumes. It wasn’t his “Archiv” anyway.
The journal is online at Digizeitschriften.de, which has a useful page for the whole serial here, but a rather awkward interface to download any of it. I ended up downloading the 9 pages individually and combining them locally. Then I found there was a button for “PDFs for individual items”, which I struggled with and finally got the same chunk in one file. Why you can’t just download the volume I can’t imagine. But I think this is teething troubles. The site otherwise seemed well organised.
There is another copy online, at digitale-sammlungen.de, here. But I only found this after more effort.
The reference to Pabst appears in:
https://www.glossaria.eu/scriptores/index.php?sigle_affich=Mirac.%20Nicol.%20Brunw.
ARCHIV is a periodical I failed to identify
Thank you!