There's not enough information to say exactly who Hailey is. She could be an ordinary person who wants to share her story, or she might be a public figure in a certain community or field.
Yes, it's based on real events. There were actual incidents related to poisoning in Salisbury that gained significant attention and were reported by the media.
The lady in white story could have originated from a real - life love tragedy that happened in one of the grand houses in Salisbury. Over time, as people told and retold the story, it became more and more supernatural. And for the headless horseman, it might be linked to the area's military past. Battles and skirmishes took place around Salisbury, and the story of the headless horseman could be a way of remembering those violent times in a spooky way.
I'm not sure if there are extremely famous ones, but there could be local legends. Maybe there's a story about a ghostly woman in white who appears near a river in New Salisbury. People might have seen her on foggy mornings, just standing by the water's edge, looking sad.
There could be various ghost stories about New Salisbury. Maybe there are tales of a haunted house in the area where strange noises are heard at night, like creaking floors and slamming doors.