Help in finding memorandum by Churchill from 16-Dec-1941.

Hello,

I am trying to find a memorandum by Churchill, presumably called “Atlantic”, writen by him on 16-Dec-1941 on his way to US.
This memorandum should describe the curent view on the course of the war.
If I am not mistaken Churchill mentions this document in his memoirs.
I could not find it my self on the net.

Any help? Thank you in advance.

Best bet is probably the Churchill archives centre. It looks like some of the documentation is available online.
http://www-archives.chu.cam.ac.uk/perl/search