E ?

Little exercise to pass the time: what romantic text am I working on?

The clue is of course the letter which starts the text (and the gilding is part of the solution).
As it’s a bit tenuous, another clue is prose, it’s in French and I’ve already calligraphed a text by this author.

Whoever gives me the author’s name will get something when the post office starts working normally again.
And another thing for the person who finds the passage in question.
Take care and stay at home 🙂