Perhaps we should investigate the work of another genealogist with "special" additions to the Colonial lines: Julius Billiter? He affects many of the Swiss and Germanic lines, here and on ancestry.com. I would like to know if Billiter worked with Anjou. I do know that JWG did travel to Switzerland once per year during the years he was brokering "false genealogies", 1880 to 1920.
I'd be very interested to know. I came across a note of mine from 1993 that Billeter's original handwritten notes (not just the parts that have been transcribed) are available in 33 films from the library in Salt Lake City.
I was thinking that would almost be worth a special trip!