An excerpt from the end of a letter where Mary Shelley rejects the advances of her long-time friend Edward Trelawny, 26 July 1831:
"My name will never be Trelawny. I am not so young as I was when you first knew me, but I am as proud. I must have the entire affection, devotion, and, above all, the solicitous protection of any one who would win me. You belong to womenkind in general, and Mary Shelley will never be yours.
I write in haste, but I will write soon again, more at length. You shall have your copies the moment I receive them. Believe me, with all gratitude and affection,
Lord Byron's first edition copy of Frankenstein (1818), one of only two known surviving copies to be personally inscribed by Mary Shelley (the other is to her friend Mrs. Thomas). Byron took this copy with him when he went into the Greek War of Independence, and it was among his personal things when he died there in 1824:
Mary didn't disclose her name in the inscription because the novel was published anonymously and she initially wanted to keep it that way. However, Byron did reveal her identity in a letter to his publisher, correcting his assumption that Percy was the one who wrote the novel:
"The story of the agreement to write the Ghost-books is true — but the ladies are not Sisters — one is Godwin’s daughter by Mary Wolstonecraft — and the other the present Mrs. Godwin’s daughter by a former husband. Mary Godwin (now Mrs. Shelley) wrote 'Frankenstein' — which you have reviewed thinking it Shelley’s — methinks it is a wonderful work for a Girl of nineteen — not nineteen indeed — at that time."
Under Mary Shelley's consultation, Thomas Moore writes in his Life of Lord Byron (vol III):
"During a week of rain at this time, having amused themselves with reading German ghost-stories, they agreed, at last, to write something in imitation of them. 'You and I,' said Lord Byron to Mrs. Shelley, 'will publish ours together.'"
Percy, writing as Mary with her permission, mentions Byron and himself (in the third-person) in the novel's 1818 preface thus:
"Two other friends (a tale from the pen of one of whom would be far more acceptable to the public than any thing I can ever hope to produce) and myself agreed to write each a story, founded on some supernatural occurrence.
The weather, however, suddenly became serene; and my two friends left me on a journey among the Alps, and lost, in the magnificent scenes which they present, all memory of their ghostly visions. The following tale is the only one which has been completed."