I learned to make Persian chain from various sites. It wasn't too bad.
I then wanted to make Persian mail. I had seen sites that show how to do it, but I couldn't get my mail to look like their examples. I gave up on trying to follow instructions and decided to attempt to figure it out myself. Well, you make a lot of errors that way, but you do definitely get comfortable with the weave, because you know all the ways it can go wrong.
I don't have any pictures of my methods, so you're stuck with text descriptions for now.
Persian 5-in-1 (HP 3-1 Sheet 5)
I started out looking for a way to connect strands of Persian chain. The easiest way seemed to be to start with a Persian strand, connect another row of rings as if it were European 4-in-1 (1 ring thru 2), and then complete as if you were making a Persian chain (1 ring thru 3), creating a European-Persian 5-in-1 hybrid.
This mail is definitely directional. It curls when stretched horizontally, but hangs fairly straight in a vertical direction. The pictures below show a 12" x 12" patch of mail made from 16 Ga. 3/8 ID galvy. The first pic show the mail hanging in the same orientation as the sample above, and the second pic has the mail turned 90°. The first pic is showing the back side of the mail, which is why it looks different than the sample above.
On 2001.10.17 (October 17, 2001, if you haven't figured out my date scheme yet), I had an epiphany at work. I suddenly realized that true Persian mail should be Persian on both sides. I made a strand of Persian 3-in-1, flipped it over so it looked like a V, and added another row as if I was making a Persian chain. I had to work a little backwards (top to bottom, instead of bottom to top) to keep my overlaps correct. It worked! I continued until I had the patch displayed above.
I apologize for the rather sad explanation of how I did it, but I hope to get pictures of the process up within a month or so.
Expanding Persian 5-in-1 (HP 3-1 Sheet 5)
The above is an example of expanding HP 3-1 Sheet 5. I colorized part of the image. The red/orange are the original strands, and the blue/green are the expansions.