The Dorabella Cipher

Elgar was also very fond of creating codes and puzzles. One of his most well-known codes is known as the Dorabella Cipher - a series of 87 characters spread over 3 lines, comprised of 24 symbols which, at first glance, seem to be the letter "e" arranged in a variety of positions.

The enciphered code is written in a letter from Elgar to his close friend, Dora Penny. Dora claimed never to have been able to decipher it, and so its message remains unsolved to this day.

One of the puzzles Jason has to solve in order to find the next clue to the stolen Elgar collection involves a series of symbols very much like the Dorabella Cipher. In this case, it's series of “c”’s, written all in different positions on a sheet of paper: vertical, horizontal, backwards and on an angle, stacked two-up, and three-up, and sitting upside down.

A copy of that can be found here:
https://en.wikipedia.org/wiki/Dorabella_Cipher

But unlike Dora Penny, Jason is given a further clue: a hand-drawn circle. Around the rim of the circle are a series of pie-shaped compartments, and inside each of the compartments, at the top, is the letter “c”—in its various iterations—that match the coded “c” squiggles on the first sheet of paper.

Along with this is a URL which takes Jason to a "secret decoder wheel". When he prints out the wheel and assembles it, replacing the outer rim with the hand-drawn circle, he's able to line up the "key" and decipher the clue.

Jason's secret decoder wheel is based on the wheel you can find here, JUST FOLLOW THIS LINK.

And, just like Jason's wheel, you can print it, cut it out, and assemble it, to create your own secret messages.