Bill: Probably I misrepresented the situation a bit. It wasn't (as I've understood it) that the Appalachian folk were not aware of their Scotch-Irish DNA connections, or even of the traditions of playing music in a certain way. They'd just lost the details - the connections with the source ballad. A feature of ballads is that they change quite rapidly and historical references get lost, and indeed performers and audience tend not to care so long as there's a good narrative and a good tune. Hollywood has made a whole industry out of altering history to make great entertainment, after all.
Also, although I don't yet understand much about bluegrass and country music and so on, I gather these have greatly influenced the original Scotch-Irish music.
A third point is the sheer speed of forgetfulness. Fiona Ritchie interviewed living performers, which means those who have been subjected to the full force of cross-fertilisation possible in modern America. I too have been astonished at the speed of change. What I regard as my mother tongue (i.e. literally the one I used with my mother) has almost disappeared in the far north of England in the space 60 years - probably much less, as it's only recently that I've become aware of how much has been lost. I used to speak more or less the way Rabbie Burns wrote "Poems Chiefly in the Scottish Dialect". I cowped ny creels as I played, I was nithered when I was cold, I scunnered at food I didn't like, daisies were gowans, larks were laverocks, and baby Jesus was born in a byre. Now even Scots themselves struggle to understand that. Just this week I came across a Scot "translating" Flowers o' the Forest (the famous bagpipe lament) in a youtube video - where the dowie lassies, having lost their loved ones in the Great War, no longer lilt as they milk the yowes on the loanin' and cast away their leglins at buchting time, he gave leglin as a stool (it's a wooden bucket), a bucht as a cattle pen (which implies he didn't know yowes were sheep) and skipped loanin' altogether.
I blame the BBC, but there's a ray of hope: I found a copy of Harry Potter and the Philosopher's Stane in Scots yesterday. Quidditch is bizzumbaw - you might see the etymology! The (London) bookshop also had Saint-Exupery's Prince-Bairn (as in my name).
Anyway, to get back to our yowes, I thought a concrete example of what I said above might help, and you of all people will appreciate this example.
(;AB[cp][qp][oq][iq]AW[ec][qd][eq][oo]TR[oo]SZ[19])
More than 200 years before AlphaGo, Chitoku, playing Genjo, went for a very early 5th line play. This was "connected" with his stone in the lower left, but not physically, of course. Rather, it was a probe so that he could decide how to handle the sabaki of that lower-left stone.
This probe had the remarkable effect of effectively making the lower right quadrant a Chernobyl area (minus the Go Seigen group) until move 83, marked - see below, and so clearly had some sort of mysterious "connection" with the rest of the game. In fact it paid off in the game through White getting a decent territory on the lower right side, not the first place you'd think of when discussing how investments can pay off. In fact I'd day it was as surprising as the mention of doolies made Harry P. drap the daud o sassidge he wis haudin. But this was meijin versus meijin - maybe you need to be AlphaGo to fathom what meijin doolies get up to.
(;AB[cp][qp][oq][iq][jr][rg][pq][pn][ld][od][kp][oc][pe][qe][hd][hf][ge][fe][ee]
[fd][df][dg][cg][di][ei][nm][qg][rf][cm][bm][bn][dn][do][gq][qh][ri][ph][oi][oj]
[hr][is]AW[ec][qd][eq][ng][nh][oo][de][ed][ce][cf][fc][gc][hc][gd][kc][lc][ci][dj]
[dl][cl][dm][fm][cn][gp][gr][hq][hp][io][oh][pd][rd][re][oe][nq][ne][rh][of][pg]
[pi][qi]TR[nm]SZ[19])