Last week, the puzzles Monday through Saturday worked together to form a meta-puzzle; the Saturday puzzle included clues for solving the over-arching puzzle. I solved the 'second' part first, and after a certain amount of diddling around, I found my way to the instructions hinted at by the first clue. After that, it was just a matter of writing out the sequence to be sure that my intuition about the final answer was correct.
In a feat of crossword construction that is certainly impressive, Patrick Berry outdid himself. I myself attempted a feat of construction--unable to resist a possible reader-participation project:
Substitution of a pdf file for the usual Across-Lite puzzles on one day of the week meant that I had to correct for the disproportion (top of die); and frugal re-use of the back of some 'neon colors' pages meant that I had one lime-green face. All of this just adds to the character, right?
The meta-puzzle referred to a 'famous crossing'--JULIUS CAESAR: THE DIE IS CAST.
A lot of fun!