> The "Stammbuch Elias Walther" (c. 1660) gives the cittern tuning as > (bottom-to-top) d'-g-b-e'
Playford's c.1660 gittern book uses this tuning, and Praetorious notes an instance of it as well. It does create some non-adjacent voicings meaning one can't simply strum, but then Playford also says to throw the pick away and use fingers. To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
