 Mrs. Tittlemouse actually made her debut in 1909 in Potter 's The Tale of The Flopsy Bunnies where she rescued the six children of Benjamin and Flopsy Bunny from Mr. McGregor 's grasp and was rewarded for her heroism with a quantity of rabbit wool at Christmas . In the last illustration , she is wearing a cloak and hood , and a muff and mittens fashioned from the wool . Mrs. Tittlemouse is a key ( not a central ) character in the tale , but a character incompletely personified , and one whose story Potter chose to develop in 1910 . 
