Well done. I know you've heard this but the one thing I would add to any critique here would be to say, be careful that you are showing, instead of telling. If your shop keeper is a larger than life character, have him show me. I know it, because you said it but then he acted like a perfect British gentleman. Maybe I'm just too American, but he certainly wouldn't earn that description here from what we see in the story. I love the opening, him being imprisoned, as it were, by the rain. Charming story, a nice expansion, glad you were inspired!