'But I have studied the place for myself,' continued Mister Enfield. 'It seems scarcely a house. There is no other door, and nobody goes in or out of that one but, once in a great while, the gentleman of my adventure. There are three windows looking on the court on the first floor; none below; the windows are always shut but they're clean. And then there is a chimney which is generally smoking; so somebody must live there. And yet it's not so sure; for the buildings are so packed together about that court, that it's hard to say where one ends and another begins.'

We walked on in silence for a while as I wondered whether to inform my kinsman that the door led to the laboratories adjoining the back of the house belonging to my friend and colleague, Doctor Henry Jekyll. Finally, I spoke, 'Enfield, 'that's a good rule of yours.'

'Yes, I think it is,' returned Enfield.

'But for all that,' I continued, 'there's one point I want to ask: I want to ask the name of that man who walked over the child.' I didn't need to ask the name on the cheque, that was all too plain to me already.

'Well,' said Mister Enfield, 'I can't see what harm it would do. It was a man of the name of Hyde.'