Very gratuitous :)

that's a very thin fabric for a top garment.... But I can see the writer is having fun with it.

Though, a gentleman would indeed have used the front door.

"his warm brown skin had gone dull and worn." That looks like a modern view creeping in. Are we in the period where a sun tan suggested you were working class? Or could men get away with if they did a lot of hunting? A society woman certainly wouldn't.