In 1779, Mr Thomas Brand surgically reassigned the gender of a seven-year-old child from female to male, thus enabling him to urinate standing up, wear trousers, and enjoy the privileges of being a male. This case study, published in London in 1787, illuminates 18th-century debates over gender, sexual ambiguity, and medical theories and practices. Mr Brand, Surgeon, uses his case study to claim that the body is two-sexed, and that hermaphrodism is a fiction. He proposes that the anatomical knowledge and practices of surgeons such as himself are superior to those of higher-status physicians. Mr Brand does not have a lot to say about his patient or her/his parents, except to conclude that if the patient had been of the upper classes, the case would have been a lot more interesting.