He averred positively that he did not specially notice any suspicious-looking individual crossing the hall that day.

'But,' he remarked with a smile, 'I don't sit and watch every one who goes up and downstairs.

I am too busy for that.

The street door is always left open; any one can walk in, up or down, who knows the way.' "That there was a mystery in connection with Mrs.Owen's death--of that the police have remained perfectly convinced; whether young Greenhill held the key of that mystery or not they have never found out to this day.
"I could enlighten them as to the cause of the young lithographer's anxiety at the magisterial inquiry, but, I assure you, I do not care to do the work of the police for them.

Why should I?
Greenhill will never suffer from unjust suspicions.