Beaver Publications Part V

Canada's first mass market paperback publisher, Beaver Publications of Hamilton, is vexatious and I recently found a few bits of information that do indeed vex. 

The Hamilton Public Library has a copy of Modern Shorts with a handwritten notation on the title page beneath the name of the last author listed, Leslie Hamilton, that says "pseudonym of Henry Bolton". A check of Vernon's City of Hamilton Directory from the early forties tells us:

• the only Henry Bolton listed is a salesman,
• there is no listing for Beaver Publications, and
• the only Leslie Hamilton listed is an employee of Robert Duncan & Co. who printed Modern Shorts.

Did a real Henry Bolton use the name of one of the printer's employees as a pseudonym? Is the notation in the book correct? Who was Henry Bolton?

The biography of Leslie Hamilton in Modern Shorts says very little but there is a picture of a very "authorial" man.