Thanks Toia. I don't have (read) Ruth Randall's book (would love to), her books are almost impossible to get here (shipping is the problem). Obviously there are many things in her books one doesn't find in most other books (just yesterday it turned out to be the same with a quote about A. L.'s alledged appetite for fricasseed chicken), so it's a pity she has no footnotes (like many old books).
However, if it happens you find or remember an original source one day it would be great if you could share.