Grand Victorian-era mansion, intricate Gothic Revival style, ornate stone carvings, steeply pitched roofs, towering spires, stained glass windows, heavy drapery, luxurious velvet curtains, richly patterned rugs, polished wooden floors, grand chandeliers, intricately carved wooden paneling, mysterious atmosphere, foggy London streets, gas lamps, horse-drawn carriages, autumn leaves, misty morning, warm golden lighting, cinematic composition.