Q3.63. The Source
Phase 1. Magic Anomalies
It's one of the objectives that you start the chapter with.
Phase 2. Sensors
Ask Triss about the magical anomalies and she'll give you three magical sensors that you have to place in the city.
Phase 3. The First Sensor
Place one sensor in a sculpture there (M14.29).
Phase 4. The Second Sensor
Place the second sensor in a sculpture (M15.9) near the entrance to the sewers in Temple Quarter.
Phase 5. Sensors in place
The third one goes inside a sculpture (M22.2) at the cemetery.
Phase 6. Source Child
Visit Triss (M14.1) and talk to her. You'll get a new quest and a recipe for her trademark potion.
Phase 7. Shani
When you enter Temple Quarter, you'll meet Shani and listen to her thoughts on Triss.
Phase 8. Alvin Kidnapped
In the hospital (M15.19) you meet Dandelion, who tells you how he stood in defence of Alvin, who has been kidnapped. Leave the hospital and follow Dandelion to reach the kidnappers' hideout (M15.20).
Phase 9. Alvin Found
Just after entering the hideout you have to face 4 assassins. After a short conversation with Alvin, Dandelion appears. Tell him to take Alvin to either Triss or Shani. After you talk to him, 4 more assassins appear.
Phase 10. Alvin and Shani
If you decided that it's Shani who should look after Alvin, go to her (M15.3).
It turns out that she has somewhat high expectations of you. Before you leave, you meet Dandelion again and the day ends with you drinking with both him and Zoltan. You'll end up completely drunk at Shani's house - she won't talk to you until you sober up. Meditate until you do then find a Silver Amber Ring for her. It'd be good if you talked to Alvin a few times before that, becoming a kind of father figure.
Phase 11. Clarification
Go to Triss and explain her decision to her.
Phase 12. Discontented Triss
... And don't expect her to take it lightly. (quest over)
Phase 13. Alvin and Triss
If you decide to give Alvin to Triss, go to her (M14.1) and talk to her.
Phase 14. Clarification
After talking to Triss go to Shani (M15.3) and...
Phase 15. Discontented Shani
... tell her that you gave Alvin to Triss. In this case you'll also get quite dissed. This proofs one thing - you can't go right with women, can you?
Phase 16. Woman and Child
When you go back to Triss, it'll turn out that she's expecting a ring from you. Before you leave, you meet Dandelion again and the day ends with you drinking with both him and Zoltan. You'll end up completely drunk at Shani's house - she won't talk to you until you sober up. Meditate until you do then find a Silver Ruby Ring for her. Before you give it to her, talk to Alvin a few times.
Q3.64. Following the Thread
Phase 1. The Dealer
Go to Jethro (M15.1) and you'll get a quest from him.
Phase 2. Following Angus
Talk to Angus (M15.16). When he starts running, follow him to his house (M15.17), and when you enter - kill him. Take the Golden Signet Ring, a letter and a key from his body.
Phase 3. The Supplier
The letter that Angus has lets you move freely around Salamandra's territory.
Phase 4. The Right Password
Go to the sewers (M15.9) and head to the Salamandra's hideout (M16.3). Tell the thugs that Angus sent you and say the password: "Thorn". Then enter the hideout. (the password is mentioned in Angus' notes, and also can be learned from the innkeeper in the new Narakort - pay him over 200 orens to do that).
Phase 5. Gellert Bleinheim
In the chief's quarters (M17.3) you find a letter and a key in a chest. All the assassins will strike you when you steal them, so you might want to drink a Swallow before that. Be sure to use Group Steel style. There are a lot of Salamanders on your way back to the exit.
Phase 6. The Destroyed Warehouse
When you leave the hideout, you'll meet Jethro in the sewers. Talk to him to end this quest and start another one: Q3.69. The Viziman Connection.