It's not mine to give.

Is it now?
You would not think it right to give away what wasn't yours--would you now ?" "Give it away! No, that I wouldn't; I'd keep it," she said, with a rough laugh.

"But if the jacket ain't yours, what right have you to keep it?
Here, Cherry, make haste.

It'll be one go apiece." They all began to tug at the jacket, while Diamond stooped and kept his arms bent to resist them.

Before they had done him or the jacket any harm, however, suddenly they all scampered away; and Diamond, looking in the opposite direction, saw the tall policeman coming towards him.
"You had better have let me come with you, little man," he said, looking down in Diamond's face, which was flushed with his resistance.
"You came just in the right time, thank you," returned Diamond.