We regard this case as one of murder, and the evidence may implicate not only your friend Mr.Stapleton, but his wife as well." The lady sprang from her chair.
"His wife!" she cried.
"The fact is no longer a secret.

The person who has passed for his sister is really his wife." Mrs.Lyons had resumed her seat.

Her hands were grasping the arms of her chair, and I saw that the pink nails had turned white with the pressure of her grip.
"His wife!" she said again.

"His wife! He is not a married man." Sherlock Holmes shrugged his shoulders.
"Prove it to me! Prove it to me! And if you can do so -- !" The fierce flash of her eyes said more than any words.
"I have come prepared to do so," said Holmes, drawing several papers from his pocket.

"Here is a photograph of the couple taken in York four years ago.