Description
"Of the Muscles of the Internal Ear.
... three Muscles belong to the Malleus, of which the first, that appears in Dissection, is the Externus of Aquapendens; the second is the Externus of Du Verny, which we call Obliquus Auris; and the third is the Internus of Eustachius, to which may be added the fourth, belonging to the Stapes, called Musculus Stapedis ..." (Cowper, 1724, Chap. XII).
Source
Myotomia reformata, or, An anatomical treatise on the muscles of the human body. Illustrated with figures after the life. By the late Mr. William Cowper ... To which is prefix’d an introduction concerning muscular motion (London, R. Knaplock [etc.] 1724).