-

REPLY:

The sources are secondary internet sources quoting the journal Parma Eldalamberon, issue #17 (www.eldalamberon.com/parma17.html), where Tolkien's personal linguistic notes (dating to the time right after LotR's release) and editorial discussion thereof were published in 2008.

http://realelvish.proboards.com/index.cgi?action=display&board;=words&thread;=27&page;=1
http://www.sindarin.de/tolkienforum/viewtopic.php?t=294&postdays;=0&postorder;=asc&start;=30

"Du." is an abbreviation for the dual number (which indicates that a subject of two persons is being referred to).

- S.P.