The copyright statement is misleading and somewhat nonsensical. The claim of copyright is made by "S.W. Erdnase," and then "Enterted at Stationers' Hall, London."
At least one British researcher has looked and found nothing there.
Then, "Entered according to the Act of the Parliament of Congress.....in the Office of the Minister of Agriculture." It says nothing about "London, Ontario."
"Parliament of Congress" is nonsense. It is either "Act of Parliament," which would be in keeping with a British copyright, or "Act of Congress," which would be appropriate to an US copyright. What it says doesn't mean anything.
This suggests either someone who didn't know what they were doing - an amateur publisher as Erdnase was - an incompetent at McKinney who typeset this after Erdnase had left and wasn't available to proof it (which also explains the technical errors in the text) - or someone trying to confuse the issue.
The book was copyrighted in the US, as Hatch and others have clearly shown...but the copyright page does not announce that. Since the US copyright forms were filled out using the pseudonym, there was no need for additional obfuscation.
As I have said before, had anyone tracked "Erdnase" back to McKinney, all they would have found, had McKinney talked at all, was their belief that it was a man named Andrews (an additional pseudonym I believe my candidate would have used) wrote the book. Sorry, we don't have a forwarding address for him.
It should also be pointed out that the Preface contradicts what Erdnase supposedly told Smith...that he was a "reformed gambler who had decided to go straight."
In his Preface Erdnase writes, "The hypocritical cant of reformed (?) gamblers, or whining, mealy-mouthed pretensions of piety, are not foisted as a justification for imparting the knowledge it contains." His "justification" for writing the book, his "primary motive" as he describes it, is "he needs the money."
This is highly unlikely as anyone who had ever been involved in the publishing business well knows. The book took years to research and write and the actual publishing process took several months, with all publishing services paid for in advance by Erdnase, to be followed by distribution and sales (details currently unknown) before any money would be realized. A minimum of four months if he had customers ready and waiting. Longer if he had to develop the market after the book was available. Hardly the actions of a someone who "needed the money."
There is no evidence that I am aware of that gives the number of copies printed in the first print run, or if the first run was the only print run. The plates were at McKinney and available for addition print runs, should the demand be there.
Common printing/publishing custom suggests for economy and a reasonable cost per unit, the first run was probably 250 to 500, but we don't know with any certainty. It could have been more...or less. Then there are the six or seven months between when the book was available to Erdnase and when it was made known publicly in the magic press of the day, another two before an ad appeared.
It may be that Erdnase sold/distributed the books he had planned on, that the book served whatever purpose he had in mind and that what was left could be sold to magicians. Part of the purpose of the magic section - written without the persona seen in the Artifice section - was camouflage, disguising the book's true purpose as a primer for cheating with cards. Indeed, years later, print run was seized by a vigorous sheriff for exactly that reason. In Erdnase's day, the First Amendment was not interpreted as it is today and a pure primer on card cheating would be seen as an offense to public morals. Possibly the book was sold "under the counter" for a period of time before people saw that it was not going to attract much heat.
The book was equivalent to a $40 or $50 book today, so it wasn't cheap....and we do not know if Erdnase sold them at list price or for more.