What gift does George give to Uncle Tom when he catches up with Haley’s wagon at the black- smith’s shop?

George gives Uncle Tom his dollar to wear around his neck.

“Can’t help it! I say it’s a shame! Look here, Uncle Tom,” said he, turning his back to the shop, and speaking in a mysterious tone, “I’ve brought you my dollar!”
“O! I couldn’t think o’ takin’ on ’t, Mas’r George, no ways in the world!” said Tom, quite moved.
“But you shall take it!” said George; “look here—I told Aunt Chloe I’d do it, and she advised me just to make a hole in it, and put a string through, so you could hang it round your neck, and keep it out of sight; else this mean scamp would take it away. I tell ye, Tom, I want to blow him up! it would do me good!”