I'm still at the post. I did spend about 2 1/2 hours by the post working through the exercises and even then I did not get finished.
I discovered, with a bit of help from Églantine, that my digital camera can take double exposures. Here is one of my first attempts.
So, it could be a post with a beard and long hair or maybe a person whose face has been out in the rain and sun too long.
I set the camera for a macro shot.
Finally, I took another macro shot and then played again with Photoshop using a coloured pencil filter.
(I do have some more tourist shots of Malta but it was an art trip so you will have to put up with a few of my artistic attempts.)