...and still no irrefutable proof of any direct connection from Laflin's Lafitte memoirs or any other source to the Beale Papers copyrighted by James Beverly Ward in 1885.
You may be right, or, you may be wrong. "Clay, Coles, Jackson, Witcher, and Chief Justice Marshall."
Clay= Henry
Coles= both Issac and Edward
Jackson= President
Witcher= not William

Marshall= Chief Justice
In the Beale Pamphlet your author presents brief reference to an institution, also to "important business affairs in Richmond." This reference is sometimes related to the number "18", a branch of that institution which was located in Richmond, Virginia. All of the names listed above hold relationship to this institution and the man who used it to conduct affairs of state, the branch of interest relating to the Beale papers being branch 18. In 1819 there was another major event taking place in the United States that involved this institution, the author's reference to this institution being relevant to the story and the event in question.
In 1818 President James Monroe sent interim Secretary of War, George Graham, also a banker directly connected to this institution, on a secret mission into the Texas region to hold parlay with both Laffite and General Charles Lallemand. Less then one year later we have our first Beale deposit.
As Laffite was preparing to leave Galveston island he made reference to distributions as promised, this then followed by secret reference as to his planned route of travel, a branch of the institution in question present in all four of the directions he intended to travel.
Now obviously there is a boat load of research in all of this and unfortunately it is all somewhat complicated and little in depth, so no simple to understand short explanations are even remotely possible. But I will say that your author knew "exactly" what he was talking about and that his story was intended for a targeted audience, just not in the manner you believe.
In the Beale Pamphlet story what was the alleged reason for hiding the two deposits in the first place?