Don't know how accurate this is, but cheated and used copilot with duployan shorthand and the image and got this:
Deciphering Duployan shorthand can be a bit of a puzzle, but I'll give it a shot! Here's a rough translation of the shorthand text on your postcard:
```
My dear Arthur,
I hope this letter finds you well. It has been a long time since we last spoke, and I miss our conversations. I am looking forward to seeing you again soon. Take care.
Yours sincerely,
[Name]
```
Please keep in mind that shorthand can be highly personalized, and variations in strokes and symbols can lead to different interpretations. If you have more context or if there's a specific part you'd like me to focus on, let me know! 😊
If any of that is in there, it seems to miss out quite a lot!