'You are a true friend, Watson,' Holmes said at last.
'You came with me without a question. Did you
realize that someone was following us?'
'I thought so. But who?' 'Can you not guess?' 'No.'
'He calls himself Jack the Ripper.'
'Holmes!' For a moment I found it difficult to speak.
Then I asked, 'Did you see him through the window?
Where was he?'