This delightful character made her appearance in the book The Tailor of Gloucester™ first published in 1903. The Tailor of Gloucester™ was Beatrix Potter's own favourite among all her books. The story is set in "the time of swords and periwigs and full-skirted coats." While toiling in his shop one Christmas season, the Tailor looked up from his work to see a lady mouse dressed in finery peeking around a cup on the sideboard! She shyly curtsied before hopping down and disappearing under the wainscot."
I love the detail on Lady Mouse, she was a joy to knit up.