Though Oliver held deep grudges against Darryl, he was also aware that he was a righteous man instead of a small person who would switch sides. Therefore, Darryl would certainly have not surrendered to Morticia.
A few hours earlier, Oliver was waiting for a chance. However, the Black Tortoise King stayed in his tent and he could not find a time. Until the night came and Oliver saw the Black Tortoise King had left, he knew that it was his chance.
Oliver's plan was simple. He only needed a reason to lure Darryl away from his tent, so he would be able to enter it and search it.
Quickly, Oliver had looked through the tent once and he did not find any clues. He was frustrated but as he was about to leave, something caught his eyes. He saw that there was a piece of paper and a quill in the corner of the tent. Moreover, the ink on the quill had not dried up. Darryl had recently written a letter.
He became emotional and rushed over. He then buried the quill and the paper underneath the ten