Per Ardua Libertas - Hardcoverby M. I. 9. (Author), C. a. Brown (Editor) Per Ardua Libertas The British M. I. 9 Escape and Evasion Equipment Catalogue1942 This reprinted edition of Per Ardua Libertas brings this exceptionally rare and historically significant book back into print and makes it available to the widest possible audience. Per Ardua Libertas, the title of which translates to "Freedom Through Adversity", was created by British Intelligence Section M. I. 9 in 1942 as a