double secret from secret department

double secret is one of six prints from the series secret department with jeff crouch 2013,
http://compostxt.blogspot.com/2013/07/cecelia-chapman-six-prints-from-secret.html 

ok, I just wanted to explain (scroll down)...because I don't want anyone to feel that Mail Art Dossier is just post-marked mail, you can share any kind of art you want, because by the time it gets here it IS mail collaboration...right?