This is a Storyline Quest with multiple parts. The previous quest in the sequence was:
The next quest in the sequence is: The Sigil

Quest name: The Deep
Part 1
- Quest starts at: Jessica_Sumerisle
- Quest ends at: Jessica_Sumerisle, Liverpool Street Station
Part 2
- Quest starts at: Jessica_Sumerisle
- Quest ends at: Emmera Ephram, Templar Base

Objectives

Rewards

Part 1 - Upon Arrival

Jessica Sumerisle: Ah, there you are. I've heard much, <playername>. People can't help but talk.
Jessica Sumerisle: I've enjoyed their stories and am glad to finally meet you. You've done us all a great service.
Jessica Sumerisle: I too was saved by your train. Did you know?
Jessica Sumerisle: Well, it doesn't matter. you saved many that day.
Jessica Sumerisle: To business then?
Jessica Sumerisle: Arpuaun and Emmera let me know you'd be coming. They want me to guide you on a quest for the Sigil, or at least a means to mark it. Apparently there's a difference now.
Jessica Sumerisle: I think they are...optimistic. Our own journey was less than enlightening, <playername>.
Jessica Sumerisle: We followed the path, explored the ways, and came up empty.
Jessica Sumerisle: But if you truly with it, Saul, Seeker Crowe and I can accompany you down the same roads.
Jessica Sumerisle: We'll retrace our steps into the deep Necropolis and...I don't know...hope for luck?

Part 1 - Upon Completion

Jessica Sumerisle: I can't believe it...
Jessica Sumerisle: This is the same place, but different! It's as if the world itself reshaped for you, <playername>.
Jessica Sumerisle: Whatever these Truths are, whatever Emmera sees, whatever we've done here... You are at the heart of it.
Jessica Sumerisle: We've marked the Sigil. I don't know exactly what that means, but we've done it.
Jessica Sumerisle: Emmera and Arphaun will want to hear of this. They'll be waiting for our return.
Jessica Sumerisle: All these years living under my grandfather's shadow, clinging to his last words... "My greater destiny."
Jessica Sumerisle: Have I fulfilled it, Grandfather?

Part 2

Emmara: It has begun.
Emmara: The Sigil is marked. I can see it with my naked eye!
Emmara: The River within me has chilled.
Emmara: It prepares.
Emmara: I am at a loss, <playername>. But I see it all. The Sigil will rise and create the Battleplain.
Emmara: We have the chance. We can bring Demonkind to its knees. We can behead its masters.
Emmara: I know them too. I have seen Sydonai, Arphaun. He waits for me at th eHellgate.
Arphaun: Hm, One step at a time, shall we?
Emmara: Of course. But with each step taken, however small, I grow more...aware.
Emmara: Even now I sense the path laid before us, clear and cold as the River of Souls itself. And in my mind the River speaks a single word: "War. War. War."
Emmara: It would have us war, Arphaun.
Emmara: Who am I to know this?
Arphaun: I don't know, lass.
Arphaun: That's no corruption in you and you're no Cabalist. But this prize... Hmph! It's dangled before us.
Arphaun: We happened upon Truth. We were lead to the marking. Now we must fight upon the Sigil.
Arphaun: But are the gifts proffered genuine or lures? Is the Dark speaking through you to lead us to murder - to lead us to this Eldest?
Arphaun: Or is something else happening?
Emmara: Too many questions, Arphaun. I hear too many questions and can give no answers.
Emmara: I know only this: Soon we will be tested. Only those who pass can raise the Sigil to level all realms.
Emmara: Then we will walk upon the Battleplain and The Herald shall lead.