Help understanding old German signature on a letter

Note: I hope this is not off-topic. If it is, please don't be mad at me and just close the post 🙏🏻

Hi to everyone,
I'm a collector and enthusiast of old letters and documents, and recently I bumped into a very cheap little lot of letters that are written in German, mainly from XVIII and XIX century.
Since I've managed to understand some signatures yet, and it happened that there were some interesting signatures (Wilhelm Creizenach, Hermine Villinger, Friedrich von Esmarch and Ernst von Wolzogen), there's a good chance that there could be some others.
I'm stuck with this one, and even if there are 7 letters, I really can't figure it out.
Maybe you could help me ✍🏻
The letters are from the second half of XIX century.
In the first one there are all the signature of the letters, and then I added 4 more photos of a letter, that maybe could help to understand the calligraphy.

P.s. I'm Italian. I'm on my way to learn German, but it's not easy, and cursive old German is written in a way called Kurrent that not help too much for a beginner (even if that's not the case).