Whilst researching an answer to Combination Lock, I was reminded of word puzzles such as the visual
popularized by newspaper puzzle pages and TV programs such as "Catchphrase". I am aware the modern term for such pictorial usage is rebus** (n.) c. 1600, from Latin rebus "by means of objects," and according to wiki can be traced back to similar usage in Egyptian hieroglyphics and possibly earlier.
However I seem to remember a form of cypher only using Latin letters but can't track such a reference. so for the example above it would look like
Note that it would not necessarily have upper lower case that is just my emphasis for clarity.
Can anyone put my mind at rest that it's not just a MfYi gMmIeNnDt (a figment of my mind) and, more importantly, what is this kind of puzzle or cypher called?
Hellion reminded me a similar form of substituting some characters for words is called a Gramogram or grammagram (as may be used in text-speak) but that also is a more modern substitution. NOR were letters added, such as in Pig Latin. What I'm after is an older usage by just the "mixing" of original letters.
And microenzo has identified it as probably a form of plaintext transposition cipher, which at its simplest can be made by wrapping a strip round a scytalae former such as a pencil and with some variation (perhaps a Caesar cipher) that I still cant recollect would probably look like my garbled words.
It looks like it was a 2 line form of Rail Fence Cipher as used by the greeks on thier scytale from the answer by microenzo thus
"Now is the winter of our discontent"
after unwrapping would become
Nwi h itro u icnet o stewne fordsotn.