amanuensis

plural amanuenses

1. One employed to take dictation, or copy manuscripts.

   As pay was Lady Anne's object, and poor Georgiana was intended to be the amanuensis, should she be found capable of forming sentences out of disjointed hints, and of wrapping foul facts in clean composition.

   1842, [anonymous collaborator of Letitia Elizabeth Landon], “(please specify the page)”, in Lady Anne Granard; or, Keeping up Appearances. […], volume II, London: Henry Colburn, […], →OCLC, pages 296-297

2. A clerk, secretary or stenographer, or scribe.

   I, his mere amanuensis, am left to do what little I can to keep the institution functioning.

   1974, John Gardner, “The Warden”, in The King's Indian

   2 more examples

   In consequence of this fashion of authors dictating their works, expedition came to be considered of the utmost importance; it was regarded as the chief accomplishment of an amanuensis; and he alone was considered as perfect in his art, whose pen could equal the rapidity of utterance: […]

   1827, John Colin Dunlop, History of Roman Literature from its Earliest Period to the Augustan Age, volume II

   “[…] We are engaged in a great work, a treatise on our river fortifications, perhaps? But since when did army officers afford the luxury of amanuenses in this simple republic?[…]”

   1910, Emerson Hough, chapter I, in The Purchase Price: Or The Cause of Compromise, Indianapolis, Ind.: The Bobbs-Merrill Company, →OCLC, page 12