Ackermann’s Repository of Arts, November 1810.
Half dress would have been worn for informal parties, dinners, and sometimes the opera, ie any occasion that did not require the formality of full dress.
The print is described in the magazine as follows:
“A round gown of white crape, fancy leno, or muslin, with deep embroidered border at the bottom, and bosom ornamented to correspond; short sleeves and tucker of Mechlin lace; an under-dress, or slip of pink satin. Hat of imperial silk velvet (à la Maria Louisa), ornamented with gold embroidery, and curled ostrich feathers. Shawl of white Indian mohair or Paris silk, embroidered with gold and shaded brown silk, finished with correspondent tassels, neck-chain, and Maltese cross of elastic gold. Indian bracelets, and ear-rings to correspond. White satin slippers, with silver filigree clasps. French kid gloves, and fan of silver-frosted crape.”