Spoiler - which herald died the same night as Gavilar

[Odontosaur Spren]

In the prologue to book 5 where we see events surrounding Gavilars death from his own viewpoint, the Stormfather cries out 

«A Herald… A Herald has died… No. I am not ready… The Oathpact… No. They mustn’t see. They mustn’t know…»

which herald is this? The only herald we know to be dead is Jez isn’t it? We know it isn’t Shalash (probably the one the other heralds refer to when saying «we saw her handywork» in the study with Gavilar). Many of the others are known to be alive in book 4; so who died during the assasination?

Does anybody know or have any thoughts?

[Dellexe Stormwarden]

There's a theory that I saw recently as I was getting back into Cosmere stuff in preparation for the upcoming releases that I find to be very interesting, here: 

 

Spoiler