I haven't run across subsequent data regarding Cowan....but the story is eerily similar to theories we've run across many times in our Ripper research.

One, that this man kept a diary ( Remind you of someone ?)
Two, that he was institutionalized....and the police ( so far, as I said I am not finished checking ) could not prove by way of concrete evidence that he was the fiend of the Rockies....

The first story was old news by the time it hit the streets in Dundee....

Dundee Evening Post
April 23, 1901

Prior to the story above.....

Indianapolis Journal
April 5 1901