The Modern Forgery Hypothesis

[proto57]

By the way, I was wondering... can you post (sorry if you did, and I missed it) the origins and years and location of the matching examples you did find? Do they fit the requirements of my Theorem #1, as in being in print by 1910?

One thing that I would like to mention is that I have deliberately attempted to search for all of the month name forms all the way to the 20th century, specifically to remove bias in this respect. I found it entirely possible that the forms may have been, say, 19th century german, so my OCR scan searches are inclusive of all later digitised sources. This includes things like newspapers. When doing this, I also have redone the search with many common mistaken OCR readings to lower the chance that they get missed (one of the aberillens was actually found by searching for averillen). 

For printed works, one of the benefits of printed materials is that OCR scans work really well for those sources as the typeset is generally standardised (and their mistakes and misprints are somewhat standardised too).
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As far as I know, 'aberil' is not present in printed works.

Here are the 3 examples in manuscripts:
You are not allowed to view links. Register or Login to view.  ,1475-1525AD, Germany S, Rebdorf
You are not allowed to view links. Register or Login to view.   ,1201-1300, Austria, Judenberg?
You are not allowed to view links. Register or Login to view.  ,1418-1420 France E, Strasbourg (3rd line from bottom)

I'm not sure what method you have used to search for these words, but I just did a search by my usual method, and found many examples of "aberil", used for "April", in several printed works before 1910. Here is one of them:

   

From the 1852 book, "Die Näfelser Fahrt: ein Gedicht in schweizerischer Mundart", Page 5: You are not allowed to view links. Register or Login to view.

That is the only one I tried, but I will try some more later. My method of finding any references is to go to Google Books and search for the term. Then I use "tools", and set a range of dates from 1/1/1200 to 1/1/1912, to see if any said reference was in print by then.

Interestingly, "Abiril" as April not only appears in several German books, but heavily in 18th and 19th century published, printed works.

So Aberil actually does fulfill the requirements of my Voynich Theorem #1 quite well, but as I wrote, I do look forward to searching the others, too... I'm just super busy this morning, and far behind on my real-world tasks and responsibilities for the day!

Thanks, Rich

EDIT TO ADD: The above screenshot of the 1852 "Aberil" passage translates to, "On the ninth of April, the weather is really nice—just beautiful; you can go straight out for a walk, as it couldn't get any lovelier."- which also tells us that Google Translate is very aware that "Aberil" means "April".