I always thought the Harmonica as we know it dates from about the 1820's Here's some links I found, but the don't mention if Nyn Kwya was able to play "hide the salami". Boy, talk about picky!

He:Yo, babe, how ya doon? I'm the Emporer of frickin' China.
She:And???

http://www.celticguitarmusic.com/aboutharm.htm
http://library.thinkquest.org/C001468F/library/instruments/woodwinds/harmonica.htm