“Why?”

“The writing, in the first place.”

“That will hardly do. It might be taken for the writing of a woman a little more masculine than is usual, or of a man a little more feminine than is usual. I carefully examined the writing before I gave you the letter, and could not determine satisfactorily to myself which it was.”

Edith again examined the letter, and said that she should be afraid, after a second look, to stand on either side.

“The truth is, Edith,” said Nick, “it is an assumed hand, not the natural one of the person who wrote it, and is not always employed by that person. That is my belief.”

Again Edith studied the letter.

“There is something about the whole thing,” she said, “that impresses me with the notion that the writer of this is a woman. But if you were to ask me why, I could not tell you.”

Nick laughed.

“It is the same old story of puzzling mystery.”

“Then you know something of the Brown Robin?”