With the sudden threat of a fourth letter and an even greater backlog, I've buckled down and finished off our long delayed analysis of the first three Cortana letters.

Most of the points have already been explored, but it was worth going back over and drawing some definitive conclusions and looking at the letters as a set. Among them are such items as Cortana's relationship to Durandal, and less debated topics as her personality and gender (yes, I said her ... heh).

Of course, nobody is infallible... I look forward to debating some of the finer points with interested readers.