He mentioned the a hunter named Mislav was the one who found the bodies, and recommends you talk to him.
The hunter's name is Mislav.
When you arrive at the House the hunter is not there.
- You cannot break open the door.
The Beast of White Orchard Quest
- Ask the Herbalist about buckthorn
- Find some buckthorn on the riverbed using your witcher senses
- Ask the hunter where he found the bodies
- Use your witcher senses to find the hunter
- Kill the wild dogs
- Talk to the hunter
- Follow the hunter
- Examine the site of the Nilfgaardian soldiers' death using your witcher senses
- Follow the Nilfgaardian soldiers' tracks using your witcher senses
- Search the griffin's nest using your witcher senses
- Talk to Vesemir
- Prepare to fight the griffin
- Meet Vesemir in the field where you plan to ambush the griffin
- Kill the griffin
- Take a trophy from the griffin's corpse
- Collect your reward from the Nilfgaardians