When Hubert relents, Shakespeare's Arthur does not promise reward, he
simply breathes a sigh of exquisite affection:

"O, now you look like Hubert: all this while
You were disguised."

And finally, when Hubert promises never to hurt him, his words are:

"O heaven! I thank you, Hubert."

Arthur's character we owe entirely to Shakespeare, there is no hint of
his weakness and tenderness in the original, no hint either of the
pathos of his appeal--these are the inventions of gentle Shakespeare,
who has manifestly revealed his own exceeding tenderness and sweetness
of heart in the person of the child Prince. Of course, there are faults
in the work; faults of affectation and word-conceit hardly to be
endured. When Hubert says he will burn out his eyes with hot irons,
Arthur replies:

"Ah, none, but in this iron age, would do it! The iron of itself, though
heat red-hot,"

and so forth. ... Nor does this passage of tinsel stand alone. When the
iron cools and Hubert says he can revive it, Arthur replies with
pinchbeck conceits:

"An if you do you will but make it blush, And glow with shame at your
proceedings,"