Adam read this over several times, and then, his mind being made up, he went to Mimi and asked if she had any objection.  She answered—­after a shudder—­that she was, in this, as in all things, willing to do whatever he might wish.

“Dearest, I am willing that you should judge what is best for us.  Be quite free to act as you see your duty, and as your inclination calls.  We are in the hands of God, and He has hitherto guided us, and will do so to His own end.”

From his wife’s room Adam Salton went straight to the study in the tower, where he knew Sir Nathaniel would be at that hour.  The old man was alone, so, when he had entered in obedience to the “Come in,” which answered his query, he closed the door and sat down beside him.

“Do you think, sir, that it would be well for me to buy Diana’s Grove?”

“God bless my soul!” said the old man, startled, “why on earth would you want to do that?”

“Well, I have vowed to destroy that White Worm, and my being able to do whatever I may choose with the Lair would facilitate matters and avoid complications.”

Sir Nathaniel hesitated longer than usual before speaking.  He was thinking deeply.

“Yes, Adam, there is much common sense in your suggestion, though it startled me at first.  I think that, for all reasons, you would do well to buy the property and to have the conveyance settled at once.  If you want more money than is immediately convenient, let me know, so that I may be your banker.”

“Thank you, sir, most heartily; but I have more money at immediate call than I shall want.  I am glad you approve.”

“The property is historic, and as time goes on it will increase in value.  Moreover, I may tell you something, which indeed is only a surmise, but which, if I am right, will add great value to the place.”  Adam listened.  “Has it ever struck you why the old name, ‘The Lair of the White Worm,’ was given?  We know that there was a snake which in early days was called a worm; but why white?”

“I really don’t know, sir; I never thought of it.  I simply took it for granted.”

“So did I at first—­long ago.  But later I puzzled my brain for a reason.”

“And what was the reason, sir?”

“Simply and solely because the snake or worm was white.  We are near the county of Stafford, where the great industry of china-burning was originated and grew.  Stafford owes much of its wealth to the large deposits of the rare china clay found in it from time to time.  These deposits become in time pretty well exhausted; but for centuries Stafford adventurers looked for the special clay, as Ohio and Pennsylvania farmers and explorers looked for oil.  Anyone owning real estate on which china clay can be discovered strikes a sort of gold mine.”

“Yes, and then—­” The young man looked puzzled.