form into ringlets

Entirely in a subconscious way I observed that Miss Hamm's hair was not plaited up and confined to the head with ribands, pins or other appliances in vogue among her sex, but depended in loose and luxuriant masses about her face; I remarked its colour—a chestnut brown—and a tendency upon its part to form into ringlets when unconfined, the resultant effect being somewhat attractive.

Do not disturb the hair until morning, when untwist and form into ringlets.