The moment he heard Martha's voice, the Doctor reached over and activated the privacy settings on the tablet. While he doubted the Master would be able to do much prying just yet, there were other people he didn't want to listen in on this conversation. Not that he thought some of them would, but, well, it was better to play things safe.

"Hello, Martha," he said tiredly, pushing himself to his feet and starting to move further from the House. "I'm on the slopes of Mount Perdition. But that's not as important. I've sent Jenny to meet me at your location, sorry. It was the only thing I could think of to stop her from coming here right away. So we need to talk quickly, before she has the chance of overhearing any of this."