five times river asks the doctor his name; pg, 1217
His name was unknown. It had always been a sticking point with them- but somehow without being one. She had just learnt not to ask him. But there were times when she couldn’t help herself, she would throw the question out there and simply hope for best.
(a/n there's not much to say, really. This has been going around my mind for a while now, and I think it's finally fit for public consumption.)
here