rabastan/nyx.
You know I will enter the field if you need me to. I won't shy away from getting my hands dirty for the cause.
After speaking with several sources I do believe there are several agents here at the palace that Dax may contact as he has in the past. The Bones family and of course, your assistant. As far as James and Sirius go, I think going after Pettigrew isn't the right angle. He's easy but following James's assistant and Sirius's son and Niece who he has openly conversed with may lead you to them. I have a feeling they'll avoid those they think you'll associate with them.