I am looking for a specific title. I've read two chapters a long time ago, but I cannot remember the name. The story was about a young girl with black, short hair (a bob haircut). She was very smart and had a rather tomboyish nature. The setting of the story was around 1850-1900 or maybe in the victorian era. There has also been a servant, who has been concerned about her the whole time. He was older than her, had short hair and wore glasses. I am not sure if the story was about solving mystery cases?

The manga contained a romance and shoujo tag. Maybe it'll help, but I can only remember something with adelaide oder adelaine considering the name.
Your help is really appreciated. Thanks!

Gisele Alain?

yes! thank you very much!