How did Jim feel as he left the ship to return to the stockade? Whom did he find in control of the stockade?

Jim felt hopeful..... he described it as a "brightness" that fell upon him.

Suddenly a kind of brightness fell about me. I looked up; a pale glimmer of moonbeams had alighted on the summit of the Spy-glass, and soon after I saw something broad and silvery moving low down behind the trees, and knew the moon had risen.

When Jim arrived at the stockade, he found Silver in charge.