What is the subject of Jarvis Lorry’s dream? How does this relate to literal events within the story?

This happens In Book 1. Jarvis Lorry dreams about a man who has been buried alive and then resurrected again. This dream reflects Dr. Manette who has been falsely imprisoned and just let out. Mr. Lorry knows that Dr. Manette keeps a delicate grasp over reality since he has been let out or brought back to life.