Alas, I am informed that “Travestissements” simply means masquerade costume or fancy dress.
So maybe that woman and little girl are not cross dressing.
However — *this* couple from an 1834-1836 Belgian fashion plate *definitely* includes a cross-dresser!
Fashion plate 144 from the Belgian edition of “Le Follet Courrier des Salons” circa. 1834-1836
Two women in fabulous costumes. One is dressed sort of like a Musketeer, but using the fashionable silhouette for women of the time, with a pinched waist, huge puffed upper sleeves, and a rounded bouffant skirt which, being a male costume, only comes to her mid-thigh. She has a black half face mask on. Her dress is in shades of pale gold and light blue with a small white ruff around her neck and a big white lace collar over her shoulders, and she has visible gold breeches with big lace cuffs at the knee. She has one hand sassily on her hip and there seems to be a blue ostrich feather emanating from it so maybe she has a musketeer hat hidden back there.
I wondered if maybe she was supposed to be Shakespeare and that was a plume pen but when I looked closer I think I can see a tricorne hat sort of folded up in her hand.
The other woman is in some sort of shepherdess outfit, I think, with a tight black bodice, short tight white sleeves, and a big white calf-length skirt with pink and green ribbon decoration. Feels like the sort of popular “rural” opera costume of the early 19th century that later “traditional” folk costume was designed to imitate.
Behind them are sketched in theater boxes and a big crowd of people in fancy dress. You can see people dressed as Turks and Muslims in turbans, clowns in pointy hats, a Marie Antoinette dress and a Harlequin.