The widow became as grey as the wall-paper, and leant against the door for support. "What? Who? I--I do not understand," she gasped.
"The murderer is called Rudolph Zirknitz," explained Ellis. "Now, who is Rudolph Zirknitz?"
Mrs. Moxton made no attempt to answer this question. Closing her eyes she slipped quietly on to the floor, and lay at the feet of Ellis, white and insensible.
[CHAPTER VII]
WHAT THE CABMAN KNEW
When Cass returned from his day's work he found Ellis impatiently expecting him. The doctor looked ill and worried. On hearing his friend's footstep he rushed into the passage and half-led, half-dragged him into the room. Harry was much surprised at this unusual excitement on the part of Ellis.
"What the deuce is the matter, Bob? You are as pale as a muffin, and your hair is all over the--"
"Harry! Harry! Never mind my looks. I am nearly worried out of my life by this--this murder."
"Or by Mrs. Moxton--have you made any discoveries?"
"Yes. I have discovered the meaning of the letters R. U. Z., and of the lizard sign."