# What does "Potochoterophii Fohsiensis" possibly mean in a Latin cryptogram from "Cocker's Decimal Arithmetic" textbook?

I was reading an old math textbook, Cocker's Decimal Arithmetic, and came across this cryptogram:

The question I have is about the beginning of the text:

Anixo guo Anamfiggino Jorammi Lehkeg Lofoxrofeholrii Torgiemgig Im Xonifafu Disohemiemgi Puwinasigfeho.

Since the vowels haven't been changed, it's easy to decipher this, using a simple substitution cipher:

Amico suo Amantissimo Johanni Perkes Potochoterophii Fohsiensis in Comitatu Wigoreniensi Ludimagistero.

Which translates roughly to:

To his dearest friend John Perkes [Potochoterophii Fohsiensis] in County Worcestershire Schoolmaster.

And this is where I got stuck. Can anyone help me figure out what "Potochoterophii Fohsiensis" might mean, or point me to resources to help me figure it out?

• It would help if you could list the substitutions. Right now I fail to see how one is to deduce t -> f. Does f -> t imply t -> f? Generally "-iensis" indicates "of" in the sense of being from some place. E.g. floresiensis = of Flores (an island in Indonesia). So "Foh" would be the place name in this case, however I am not aware of any locality by that name in Worcestershire. Sep 18 at 6:39
• "Potochoterophii" has a Greek feel to it. "Ptochotrophii", perhaps. ptóchos: (of one who crouches and cowers, hence) beggarly, poor; trophé: nourishment, food. Correction to previous comments: Fohs-iensis -> "of Fohs". Which does not make any sense either. Sep 18 at 7:07
• @njuffa Sorry about that. I didn't list the substitutions because I didn't think they were germane: I was asking a question about Latin, not cryptography, and didn't want to clutter up my question. The substitutions are: B=Z C=X D=W F=T G=S H=R L=P M=N N=M P=L R=H S=G T=F W=D X=C Z=B You are correct that F=T implies T=F. A,E,I,J,K,Q and Y are as written Sep 18 at 9:24