Booth in Boston April 1865

[RJNorton]

I am trying to research Booth's specific locations between April 1 1865 and April 13, in order to determine:
A. Whether or not he went to Montreal.

Booth never traveled to Montreal in April 1865.

I mentioned in another thread that Art Loux also includes an endnote for April 2. He writes, "Circumstantial and inconclusive evidence suggests that Booth may have taken a train to Montreal on April 2 and returned April 4."

What is the "circumstantial and inconclusive evidence? What is known about this? Jerry, is Hogan's recollection all there is - do you find it credible?