This is Tessa's letter to Will, confessing her love for him. This is like the counterpart of the note that Will wrote for Tessa.

Will,

You are utterly mistaken to think that I did not - do not - love you. Wrongly guided by myself, of course, but you have made sure that such a course of emotion was inevitable, and you should have known that no amount of dark humor and intentional cruelty could disguise nor mask the good, strong man you are.

I have loved you since Galahad, and still do until Sydney. I love you, Will - it is simply truth begging to be told.

Or written, like all other great things are.

I strongly advise you against quoting certain parts of this letter at your whim, for you will find ducks from Hyde lake lounging on your bedsheets.

Yes, William Herondale. This is the woman who has come to love you, who you have come to love, and you will bear it with humor and pride, for I will always count on you to behave as such. You might as well demand the same from me.

With overwhelming love,
Your Tess