I wonder how, and indeed why, No.6 started going to that nursery in ‘The Girl Who Was Death,’ and telling the three children his fairytale in the first place, actually came about. And was this in fact the first time? After all he did say he would come tomorrow as he didn't think he had any other important appointments. There could have been a series of fairytales, through which No.2 hoped to gain information from No.6.
The name Scheherazade suddenly springs to mind. You know Scheherazade and the tales of 1001 nights. Or is that carrying things just a bit too far? Well in all probability, yes. But reading between the lines, and putting two and two together, I can see a possible parallel.
Be seeing you.