Maybe. [ A single word that answers both Sam's current questions and future ones all at once. Maybe. Geralt isn't certain. Can't confirm anything beyond what he saw which were a pile of oddly elongated bones, gnawed on by a typical predator (canine, perhaps some rodents, too), with metal plates screwed on and traces of human blood in the air. Dried, old. But if these bones aren't human, then where did the blood come from? Is it even related? Anyone could've bled and died there long ago.

The same goes for the door. It might be a mere door, it might be where these remains originated. The door isn't closed so much as crushed under some boulders. ]

Nothing I can place. [ Is Sam sensing a theme? There's a theme. He simply doesn't fucking know. ] A way in is being worked on. I can bring back one of the remains in the meantime. I need someone who can tell me what it is.

[ Have you got someone? goes unsaid. Sam is familiar with most of the Summoned Cadens. If there's someone who can help—someone they can trust—Geralt knows Sam would have a name. What can also be read between the lines is that he plans on returning to investigate further. Once he gets what he needs, he'll be going right back out. ]