The attached letter will, I think, be found of general interest. The term “Semi-Proof” is new to me in the Mint records and perhaps means one of two scenarios.

1) Regular planchets struck with proof dies, or

2) Proof planchets struck with regular dies in a standard coining press.

The second option is the more likely.

It is also of interest to note that Pollock charged the director $1.10 for each Trade dollar.