The little boy wishes, wishes so much that the beautiful lady would speak to him and play with him, but he is shy, afraid to approach her--only looks at her with great admiring loving eyes.
But one day she meets him on the stairs, and stoops down and kisses him on the forehead.

Then he is in Heaven.

Afterward no doubt she played with him, and they walked up and down by the shore of the sea together, and now, though an old man, whenever he hears the roar of the sea he remembers the beautiful lady who played with him and caressed him, when he was a little sick child.

How much he loved her! But she was a woman, and he was only ten years old.

The reference to "chivalrous blood" signifies just this, that at the moment when she kissed him he would have given his life for her, would have dared anything or done anything to show his devotion to her.