The following is written in rigid, stiff handwriting, as if the author is putting effort into forming the letters properly.  It is sent on stationary from the Chealsea Bridge Hotel.

Raizel Cohen
Room 815
Chelsea Bridge Hotel
London, UK

Auror Vivian Callen
Level Two
Ministry of Magic
London, UK

Auror Callen,

Thank you for your patience as I looked into the matter that we discussed.

As I suspected, the engraving on the back of the jewel uses runes from the Orkhon alphabet[1].  This script originated in Turkey, but knowledge of it is common throughout Central Asia and parts of Russia.  As you begin looking for a culprit, I would start with mages coming from that region.  Rune scholars from all backgrounds might also be familiar with it.  I don't think that the average British witch or wizard would choose to use it, although I could be wrong.

From what I can tell, the hex itself is much as we discussed.  The two ends of the inscription have the same symbols repeated from the outer edge as they move inwards.  This is an enchantment meant to dull the senses of anyone who comes into close contact with the object.  The primary curse involves the symbols that are inscribed in the center.  That is what gives the command for the chain to strangle.

I should caution you though -- I do not know if the strangulation hex is restricted to commanding only the chain.  I am also still not certain what effect the Delta symbol that we observed might have on the spell itself.  I will keep investigating.

In the meanwhile, I will caution you again to be very, very careful when you handle those necklaces.  This is not nice magic.  It might be helpful if I could inspect the other stones -- to see if the inscriptions are identical, or to look for some other hint of a maker's mark.

Is that possible?  Have you had any other reports of necklaces?  If you do, it is very important that you notify me at once.

Sincerely,
Raizel Cohen

1.	More info.

OOC: Sorry for the totally late reply, I got caught up with other threads and totally forgot about this!

IC: The letter is written in neat cursive, it is a plain but heavy stationary with no markings.

Auror Vivian Callen
Level Two
Ministry of Magic
London, UK

Raizel Cohen
Room 815
Chelsea Bridge Hotel
London, UK

Raizel,

So sorry for the late reply, we've had another victim found today, quite recently really. Another young woman fallen prey to the effects of whatever dark magic is in these jewelry pieces. The necklace found on the body is similar to the other three that we have, and I'm assuming there may be more.

Right now, we are discussing a report in the Daily Prophet to warn the public about the necklace's and how to identify them. If you have any information that you would like to input, please let us know.

I will have the necklaces sent to you, either I will bring them myself or another Auror will deliver them. We have taken care of each piece and are using cautious techniques when handling them.

Thank you for your assistance, and I will tell you if we have another incident. For now we're all hoping that there won't be another, but I have a bad feeling that there may be replicas circulating the market as we speak.

Sincerely,
Vivian Callen