TheCodeBreakers
an herbal. Strong cryptanalyzed out of the manuscript several texts in
alleged medieval English, including a contraceptive formula, by means of
a "double reverse system of arithmetic progressions of a multiple
alphabet," by which he apparently meant some form of polyalphabeticity.
The contraceptive works, and anyone who wishes to prove it may do so,
since Strong published it; but he has not seen fit to do the same with his
method of cryptanalysis, and it therefore remains unproved and
unaccepted. His published texts have been severely attacked on
linguistic grounds, and the formula has been explained on the same
basis of subconscious knowledge as Newbold's spiral-nebula solution.
There have been many more attempts that did not result in
publication because the would-be solvers honestly admitted defeat.
Scores of persons have worked at home on the illustrations in the
Newbold volume without success. In 1944, from among specialists in
annaabi.ee 
