Jgant: Excellent breakdown of the chain of events.
For your further note, the reference in John is to a specific time of the day in relation to the watch. That is when he notes, "It was but night (de nox)" he means it is jsut before the "night watch" which is a short form of the "midnight watch" which is from 9 p.m. to midnight. So John left just before 9 p.m. Just some technical "trivia" for you since you broke it all down.
JC