I don't think you should contact him personally again, it is likely to just give him more hope of communication resuming. What more could you say?
Bluebelle I'm sorry but I don't think your advice is wise considering the entire situation sure is in now with regard to the police and Women's Aid. WA have involved social services to look out for her ds because of this - she can't go emailing the guy making threats!
sure has already made it clear she wants no contact and ignored him when she saw him in person. It's time he started believing her. The onus isnt on sure to make it clearer, it is on him to stop stalking her. You think if she told him she'd report the rape he'd leave her alone? I think the opposite. He'd see it as an empty threat and more reason to try and get her back under control and try and convince her it wasn't as she said.
Apologies for talking 'around' you, sure. I think it is worth contacting the police again and updating about the harassment, even if you are not ready to report the assault yet, as you have this instance of him contacting you in person, and a letter and such now that I don't think you had before? I wonder how much evidence of that they'd need before they could at least have a word with him.
Have you considered the uni counselling service yet? I know it's just one more thing to faff about with, but it might give you that element of personal support that you feel has been lacking. I used them in a similar situation and while they don't give advice as such, they do give guidance and can help you see things more objectively and figure out what you want to do.
It all felt more real to me when I started seeing the counsellor, it helped me really see the situation and actually listen to myself instead of going round and round in my own head. Once I had the confidence to trust my own feelings regarding it all, I didn't need it anymore.
Anyway, hope Wednesday treats you kindly.