My hubby has just discovered in our house a paper with a 'quiz' included - one of the questions was:  

'Which fictional detective lived at 221B Baker St, London?'

One of my children, obviously proud to know show off their knowledge, has written in the answer:

'Basil' 

(As in Basil - the Great Mouse Detective)!

Oh, dear - I seriously think we need to do some more Literature studies in this house!