Such were the shreds and fragments gathered here and there; and over these Mr. Ward and Dr. Willett held many long and serious conferences. They strove to exercise deduction, induction, and constructive imagination to their utmost extent; and to correlate every known fact of Charles's later life, including the frantic letter which the doctor now showed the father, with the meagre documentary evidence available concerning old Joseph Curwen. They would have given much for a glimpse of the papers Charles had found, for very clearly the key to the youth's madness lay in what he had learned of the ancient wizard and his doings.