The captain reacts to Redruth’s death in what way. Why isn’t he buried right away?

Tom Redruth is shot. His wound is clearly fatal, and the group helps him to lie down and die nobly. Squire Trelawney kisses Tom’s hand and asks for his forgiveness. All agree that he has nothing to fear in the afterworld, as he has died in the line of duty.

He isn't buried right away because they're trapped in the stockade.

Tom Redruth was shot by a mutineer when they went to look for the body of the man they had shot. He was seriously wounded and was brought back in the stockade. Squire Trelawney kisses him and asks for his forgiveness. All agree that he has nothing to worry about in afterworld as he died doing his duty. Soon he died and the captain took a british flag and gave on him as he was martyred while doing his duty.

He wasn't buried right away because they knew if they went out of the stockade they might be attacked by the mutineers.