Do it without invention, suddenly; As I with sudden and Extemporal speech Purpose to answer what thou canst object.
"King-Henry-VI-Part-1"
Shakespeare, William
London, 20 September 1785. He was of an admirable pregnancy of wit, and that pregnancy much improved by continual study from his childhood; by which he had gotten such a promptness in expressing his mind, that his Extemporal speeches were little inferior to his premeditated writings.
"The Journal of a Tour to the Hebrides with Samuel Johnson, LL.D."
James Boswell