Pig Pen / Domino code

The code is quite simple, although it looks complex.

Draw a 3 x 3 naughts and crosses (tic tac toe) grid with the alphabet arranged in the squares as shown below.

To encipher a message each letter of the alphabet is encoded by indicting the type box that it is in and a way of indicating its position.

F = or or

An example of it in action is shown below, taken from a message intercepted by Agent Kat: