Estranged from his family, Melvin can usually be found sleeping in the back of an ox pulled wagon that is driven by his cat familiar.
Sometimes things are simpler then they look…
You receive a vision of a rooftop "somewhere close by", where a rare moss grows; in the vision, you know the moss is suitable for greatly enhancing the effects of certain types of potions. Now go and find that rooftop. Don't fall off. (Of course, rooftop runners *will* be taken for miscreants by the local City Watch....)