Thomas Silverstein known as the most isolated inmate in the United States federal prison system. 

8 1/2" x 11" two page handwritten letter hand signed, Tommy.
The top left corner of the paper is missing which has no effect on any of his writing.
 
Includes the top portion of the prison issued mailing envelope with 3 lines of writing by Silverstein and postmarked February 2008.
Hand signed, Tom Silverstein.