The Doctor and River in “The Husbands of River Song”

Is it sad?

Why would a diary be sad?

I don't know, it's just that… you look sad.

It's nearly full.

So?

The man who gave me this was the sort of man who'd know exactly how long a diary you were going to need.

He sounds awful.

I suppose he is. I've never really thought about it.

Not somebody special then?

No. But terribly useful every now and then.