Wahaki Missive is a document in Pillars of Eternity II: Deadfire.
Whoever wrote this missive to the Wahaki ambush party left deep indentations in the parchment.
"Another outlander ship sails for Motare o Kōzi. That makes three, Embeta. Your warning to the prince only whetted his appetite, as I TOLD you it would. Better that the trespassers die on the beach than meet her ladyship inland. Finish the job this time, or I will find a warrior better suited to your responsibilities."
Following the message is an accurate description of your ship.