On Thu, 22 Oct 2009 10:29:02 +0000, James Dow Allen wrote:

Please don't reveal why I aver this memo has unique looks. Rather do
make your best original theme and post in reply.

Mentioning subsequences provided a very big hint (assuming that I have
truly solved your puzzle). Also, writing this way is a lot harder than I
assumed it would be; kudos!

martin