I've been stuck in Chapter 2 for awhile now, so started looking at walkthrus for the answer on how to proceed, but I am worried that I have hit a roadblock.

I have 9 of the 10 Seriphots and Raymond has gone to "lay low" and is no longer in his office. As far as the suspects go, I still have to bring 3 Salamandar brooches to Luevaarden so that he will talk to me. However, I earlier saw a messenger who bought all my brooches. I was able to get 2 more from an Assassin attack, but no other brooches are available. I've already triggered all the other Salamandar ambushes. After midnight, I have fought Assasins in the non-human district, but they are not carrying these amulets, just drugs.

How can I get a third Salamandar amulet to continue the quest? Some walkthrus say that talking to Leuvaarden is not essential to the quest, but how else can one trigger the child messenger from Raymond, enabling the continuation of the story (get into the graveyard, perform the autopsy, etc.)?

It's a shame to have the rest of the Chapter's story spoiled for me, but it will be worth it if I can get the game to continue without having to replay the entire chapter!