Connor was growing nervous. Thoughts were whirling through his mind, and he felt as if something was about to happen. As the seconds dragged on without anything from Elizabeth, Connor began to think that someone she had gotten out, had gone hunting after smelling his blood and he grew uneasy. 

And then she began to tap on the door. It took him a moment or two to realise it was morse code, something he hadn't used in years. It took him longer to understand what she was saying, and he let out a soft breath when he knew what it was. 

"Okay.. I'm going to leave the blood packet by the bathroom door, and then retreat to the window" He said, knowing it was kind of a threat, even though he didn't want it to be. He grabbed the blood packet, and walked slowly to the bathroom door, leaving the blood packet just outside so she could reach it, before retreating back to the window, gun still in hand. 

Just in case. 

He was still cursing himself for being a fool, and didn't know what was wrong with him, why he hadn't thought ahead. He was getting too complacent, he knew. And that was dangerous, for himself, as well as for Elizabeth.