Moot Court (1788?)

[Bapopik at AOL.COM]

   What is the earliest date for "moot court"?
   OED's entry is dreadful.  The first entry is allegedly by Thomas Jefferson from 1788, but it's cited from a book published about 70 years later.  The Library of Congress's American Memory database has a large volume of Jefferson's work online now.  There are _no_ "moot court" hits on that database!
   OED's next citation is 1899--111 years later!  Obviously, they're working on this.  What do they have?
   OCLC WorldCat has a book titled JOURNAL OF THE LAW-SCHOOL, AND THE MOOT-COURT ATTACHED TO IT AT NEEDHAM, IN VIRGINIA (1821).  Was this before the Harvard or Yale Law Schools?