Taking a brief look at the Hard in Hightown stuff itself, I didn't catch any Executor references. What did I miss? 
I did catch Worthy denying sending the note to Skyhold that talked about, "YOU ENCROACH UPON THE DOMAIN OF HIGHER POWERS. YOU WILL ANSWER TO US." With a seal of six crossed swords. Which is rather interesting. 
Very nice catch, Tib. 
EDIT: Aha! The ominous letter sent to the magistrate had six crossed swords as its seal. Does this mean that Varric is holding out on us again, or does it mean that the Executors read his books? Are they the power behind Bhelenforth, since Worthy doesn't seem like he'd have the influence to set up that many backers? Why on earth would they back a sham writer?
What is going on here?!
EDIT EDIT: http://dragonage.wik...:_Chapter_Eight
http://dragonage.wik...m/wiki/Madrigal
The Merril Analogue lists them as the legendary group that killed Queen Madrigal of Antiva, who was found dead after a hunting excursion with four swords piercing her. (What happened to the other two swords?
) Thus, the Steel Age. But I always thought that was the move that propelled the Crows into fame and fortune, as they refused to name her killers under torture? Or did they honestly have nothing to do with it, and the Executors Across the Sea just didn't care to take credit? Then the Crows get the juicy assassination contracts off of that stolen reputation?
I can't even.