While in the hebrides, what did mendelssohn send to his sister franny and why? in what way was his overture unique?

The correct answer is Mendelssohn would send his letters to his sister Fanny whom was also a musical prodigy.

He sent letters to Fanny, to tell his sister how much he liked Hebrides,

Explanation:

Felix Mendelssohn was a composer, pianist and German conductor of the beginning of the romantic period. Some of his best known works are the Dream Suite of a Midsummer Night (which includes the famous wedding march).

Mendelssohn was influenced by nature as was most of the composers of the period. One of the results of this influence was the play known as "The Hebrides" which describes the ancient caves and the rocky coast swept by the winds of Scotland.

On one occasion he wrote letters to his sisters, Fanny and Rebecca, reflecting his esteem for Hebrides: "It is written in heaven that the place covered by mists was and remains my favorite residence. My heart pounds when I think of it."