'What's all this?' he asked.

I smiled in a sort of saint-like manner.

'It's a little hard to explain,' I said.

'Yes, it is!' said the policeman.

'I was just—er—just having a look round, you know. Old friend of the family, you understand.'

'How did you get in?'

'Through the window. Being an old friend of the family, if you follow me.'

'Old friend of the family, are you?'

'Oh, very. Very. Very old. Oh, a very old friend of the family.'