Mr Burton enlightened him.

'My dear Cox, there's only one way into a flat, and there's only one way out, unless you try the window, which means a drop of perhaps a hundred feet. I'm not dropping. The Flyman's right; we shall have to see who's there. There needn't be trouble, unless you give yourself away. It depends who it is. I'll lay this dear little girl of mine upon her bed; she'll be more comfortable there, and not so conspicuous. I know which is her room. Then we'll see who's come to call on you.'

Displaying a degree of strength with which one would hardly have credited his slight figure, lifting Miss Casata off the floor, he bore her from the room. During his absence there came the knocking for the fourth time, this time furiously. When he returned, a marked change had taken place in his appearance. There were signs of strange disorder on his countenance, as if during his brief withdrawal he had been unstrung by some overwhelming shock. The Flyman at once observed his altered looks.

'What's happened? What's the matter?'

'Curse you, Flyman!'

'What have I done now?'

'I say, curse you!'

'Is she--dead?'

'No, she's not. I'm going to open the door. If it's the servants, I'll send them away, pretending to give them a message from her; if it's callers, I'll tell them a lie; if it's anybody who wants to make himself unpleasant, you two look out. I'm not going to be bluffed out of this before I've got that ruby.'

'Burton, be careful what you do, for all our sakes.'