The minute I saw the letter, I knew it was hers. There was no mistaking it: the salutation, the tiny, precise handwriting, the date, the content itself, all confirmed its ancient status and authorship... Samantha McDonough cannot believe her eyes -- or her luck. Tucked in an uncut page of a two-hundred-year old poetry book is a letter she believes was written by Jane Austen, mentioning with regret a manuscript that "went missing at Greenbriar in Devonshire."...