A letter finds it way into Jay's position, delivered from a shadowy runner with the stature of an elf..
"If you are reading this, then know that word has reached me of your expedition and know that one of my apprentices has shown an interest in joining it. The following is a few details you should know before you waste your time, just in case you have never attempted this before and get my student killed. The passage into the Undercity lies behind a section of wall in the sewers, sense the flow of the Al'noth and use your wits to detect the flaw in the vision and you will find your way beneath. Once there you will find it inhabited with mercenaries of moderate competence, and a large number of them. Bring some adept with locks and I also suggest they know how to disable traps, the first door is not the only locked path you will come across. I will leave what lurks below for you to discover for yourself, I am sure it will be most entertaining for someone of your disposition. I will say this: What the eyes promise is not as fulfilling as one might think, at least not for you."
The runner slips off the moment the letter is placed either into Jay's hand or where he currently resides.