What was the dressing-down of the Sunderlands? I don’t recall reading about that.

Sorry, not the Sunderlands, the Borrells. 

Davos I of ADWD:

“As for your King Stannis, when he was Robert’s master of ships he sent a fleet into my port without my leave and made me hang a dozen fine friends. Men like you. He went so far as to threaten to hang me if it should happen that some ship went aground because the Night Lamp had gone black. I had to eat his arrogance.“