It reads like Ron Paul is the author.
It doesn't to me. I've read some of Ron Paul's more recent writings, and the style of this piece looks different. For example, that one-word sentence "Baloney." looks like someone else's writing. Ron Paul doesn't write that way; he doesn't use one-word sentences for emphasis.
You know who should take a look at those letters? Jack Cashill. He's the expert in the matter, given how he exposed Billy Ayres. Some Paul-bashers will be disappointed, but there's a real scoop waiting for him if he does.
I have read some speculation that the real author was Murray N. Rothbard, but again I'm not the expert in the matter.