What do Victor's parents give him as a gift?

A sister named Elizabeth.

"I have a pretty present for my Victor -tomorrow he shall have it." And when, on the morrow, she presented Elizabeth to me as her promised gift, I, with childish seriousness, interpreted her Words literally and looked upon Elizabeth as mine-mine to protect, love, and cherish.

No Word, no expression could body forth the kind of relation in which she stood to me- my more than sister, since till death she was to be mine only.