You search the forge top to bottom, inside and outside, searching for any clues as to where it may have gone. The most obvious clue you find is a note stapled to the outside of the forge door; you're not sure how you missed it the first time around. In poor handwriting and poorer grammar, the note says "Ur avil were repossessed. mist paymont. -avil mortgage coppany."

This letter is obviously fake. For one, the premise is stupid. It's inconceivable that an anvil mortgage company would just reposses your anvil off a single missed payment; they'd send an agent or letter reminding you first. For two, you've already paid your anvil-tgage this month, at least you're pretty sure of it. Whoever left this note was making a clear attempt at delaying your search for the true culprit. You've got a sneaking suspicion who, or what, might have left this letter. After all, they've raided your supplies before. The real question is, why would they have taken the anvil of all things?