Theo nodded, though of course he would make sure to check for himself. Now that he knew that this symbol was connected to a myth of immortality, the request seemed much more understandable.
A spell? Perhaps. Perhaps something different. Either way, there were objects connected to this myth, objects, which if they existed, the Dark Lord would go to great lengths to find. That could be used. He wasn't sure yet, but he would be. In time. He was always a patient man.
"Well," he said. "If you have nothing more to tell me, I will not take up more of your time, Professor. I thank you for the time you've already spent on me and hope you will be in touch if you remember anything else."
He stood up, nodding towards the man. "It was good seeing you again, Professor."