William Seymour was a lawyer, and a friend of Henry Austen. Around autumn 1812, he spent a whole carriage ride in Jane Austen's company, trying to decide whether to ask her to marry him or not. In the event, he did not.
It seems likely too that on her return from London Jane was accompanied home by her as yet undeclared admirer, William Seymour, for many years later he told a member of the Austen family that 'he had escorted [Jane Austen] from London to Chawton in a postchaise, considering all the way whether he should ask her to become his wife! He refrained however, and afterwards married twice.'
Cited by the indefatigable Deirdre Le Faye, in Jane Austen: A Family Record, Cambridge University Press, Second Edition, 2004