Help With Famous last word by Timothy Findley

[Proudlycanadian]

Hi
I have an assignment to do on the famous last word by timothy findley. but i'm kinda havin a hard time putting all the pieces together.

can somebody that has read the famous last words by Timothy Findley please help me...i need help understanding the famous last words by Timothy Findley.
my Question is

What happened to Wallis and the Duke in the end of the novel? the only thing i could understand was that they were on the boat waiting for the submarine that has already been canceled and Wallis realizes that it was not going to show up-and the next thing i read is that they are on an island...i don't know where the island was and how they got there...the book says they lived there....how did they survive on the island(?).
and also where were they going to be heading had it been that the submarine showed up?...how will their running away help anybody?...who was the present king and queen as the duke(David) declined from being king? and who was his father..was his father Edward Allenby?

Please....help Thanks...