This page has details on the treasure chest buried at coordinates (333,650)
Contents
Treasure Map Location
The treasure map for this treasure was found in Tortuga at (882,337):
Treasure Map Screenshot
Screenshot of the treasure map:
Treasure Chest Location
The treasure chest is found in Matanzas at (342,642).
Where to dig
Near stone pillar there is a small cave, around coordinates (342,642). Dig there:
Chest Contents
Elite mortar storage plans and 4,000 reales