Letters from the Underhive

LordIgnatiusVult and I recently did a bits exchange (organised via Instagram messages) and he included a letter, from one his characters to one of mine, with the packet of bits he sent me:

I was so impressed by the idea, I sent a reply (and even though I'd sent my package ages before they both arrived together):

(I aged both letters by swabbing them with used tea bags and drying them over a gas hob, then dripped some red and brown ink on them and dried them again. I also added the wax seals to both).