Miss Cornelia replied for her niece.
"She hasn't said that." The detective made an impatient movement of his hand and walked away--as if to get out of the reach of the indefatigable spinster's tongue.

But Miss Cornelia had not finished with him yet, by any means.
"Do you believe in circumstantial evidence ?" she asked him with seeming ingenuousness.
"It's my business," said the detective stolidly.

Miss Cornelia smiled.
"While you have been investigating," she announced, "I, too, have not been idle." The detective gave a barking laugh.

She let it pass.

"To me," she continued, "it is perfectly obvious that one intelligence has been at work behind many of the things that have occurred in this house." Now Anderson observed her with a new respect.
"Who ?" he grunted tersely.
Her eyes flashed.
"I'll ask you that! Some one person who, knowing Courtleigh Fleming well, probably knows of the existence of a Hidden Room in this house and who, finding us in occupation of the house, has tried to get rid of me in two ways.