Prompt
Generate a realistic portrait of William McNeill Whistler, an American physician, in a 19th-century style. Depict him in formal attire, sitting in a study with medical books and equipment in the background, with a serious and professional expression. Incorporate subtle hints of his connection to his famous brother, James McNeill Whistler, without overpowering his own identity as a medical professional. Render the image in a muted color palette with attention to detail, reminiscent of oil paintings from the era.
