Lesedi and DeMarco's Intense Argument
On Day 22, DeMarco encoded the chart with his planned route. When he was about to leave Ruby's Fall where he met Burnin' Tony, Lesedi showed up. A very intense argument between the twins followed where Lesedi seems to have tried to prevent her brother from starting his expedition.
DeMarco left and Lesedi promised to do everything possible to stop him, no matter the cost.
DeMarco was so keen to get away from Lesedi that he forgot to stash his secret to breaking the code. Burnin' Tony burned the page of the secret and threw it into the sea to be scattered across the Sea of Thieves. Finally, he buried DeMarco's ship log so that he would not be tempted to burn it too.