Sherlock Holmes had sprung out and seized the intruder by the collar. The other dived down the hole, and I heard the sound of rending cloth as Jones clutched at his skirts. 'I beg that you will not touch me with your filthy hands,' remarked our prisoner,. "'You may not be aware that I have royal blood in my veins' Watson noticed that he was suddenly able to hear very clearly in the darkness. Then he noticed a light coming from the floor. It became a line as one of the paving stones opened.'