[The letter is delivered by courier]
Esteemed Lady Watchever;
My name is Dimemnelen Rimnelennus Rimferrin, and it has been brought to my attention your clan uses a rather large amount of potions and other supplies whilst doing your noble work. I was intersted in dicussing a wholesale contract with you, in which I could Provide your Clan with whatever potions or wands you may need, as well as any other wares I may have, at a discount.
However, such things are rather Rude to ask in a letter, so I would ask you to meet with me, should you have the time.
I can usually be found in the bazaar, or letters can be left in the stand.
[signed with a ridiculous flourish] Dimemnelen Rimnelennus Rimferrin