Severus gave Terry a withering look, though there wasn't much heat in it. "Shall we just take it as said so that you dont have to?" he said archly.
He leaned back in his seat and considered what Terry had told him. "It's an intriguing thought and I do like it." An idea formed in his mind but he put it to the side for now; he could think about it a bit later. "Speak to Minerva. I know that Albus had a number of books on the Fidelius. She may have placed them in the library but it's possible she may have held one or two back."
He arched an eyebrow. "And what would that advice be?"