amanuensis: (plural: amanuenses) one employed to write dictation or to copy manuscript
(Example: On the contrary, Tolstoy corrected and recorrected it so often that his wife, who acted as his amanuensis, is said to have copied the whole enormous manuscript no less than seven times! [Reference: Imperishable Fiction: An Inquiry into the Short Life of the Best Sellers Reveals the Methods Which Brought into Being the Novels that Endure, Le Gallienne, Richard])
