Vreth watched as she looked around, and smiled and nodded politely when she replied.
"I shall let you rest then" he said. "I am sure we will meet again soon" he nodded, bowing his head slightly. "You will be able to find me if you choose to, while others may not"
He could make himself hidden from those he didn't want to find him, and easy for those he wanted near him to find. It was a useful talent to have. However, on the TARDIS, he would be wasy enough for most to find, considering the trails he left behind him. It was only a matter of time before the wild life followed.