"The concealment was perfect," I exclaimed in admiration. "Where does the staircase lead?"

"To a very comfortable room underground. It had not been used for a generation until this war began. Eric and I learned of its existence by accident, while rummaging over some of our grandfather's old papers. I was about sixteen then, and shall never forget our first exploration. We found nothing down there then but a rough bunk, an old lanthorn, and the leathern scabbard of a sword. But since then Eric has been compelled to hide there twice to escape capture, and we have made the room below more comfortable. You will be obliged to grope your way down the stairs, but at the bottom will discover flint and steel, and a lantern with ample supply of candles. Peter will bring you food, if you need remain there for long!"

"Peter! Then he is in the secret?"

"Peter is in all secrets," she confessed. "From him nothing is hid, at least so far as may concern the Mortimer family. You have yet to learn the deep subtlety of Peter, Major Lawrence. He sees all things, retains all things, and reveals nothing."

"A discovery already made."

"No, barely glimpsed; no short acquaintance such as yours has been could ever serve to reveal the character of Peter. Since babyhood he has been my monitor and guide, and still he remains to me a silent mystery."

"An old servant?"

"Yes, born to the position, his father serving before him. There is no doubt in my mind but what he knew of this secret passage before Eric and I were born. Not that he has ever confessed as much, yet I am convinced our discovery of it brought no surprise to Peter. What do you suppose his age to be?"

My mind reverted to that expressionless face without a wrinkle in it, to that totally bald head, and my answer was the merest guess.

"Oh, possibly fifty."