Went through it this morning, and found these delightful articles in the Archive:

Includes a nice definition of Folk Music
The Heart of the Folk Song
 

One of the inspirations for Helen Creighton's work. A number of songs he collected are in the DT
W. Roy Mackenzie as a Collector of Folksong

 

Since a lot of people seem to want to do this in the folk field.:
The Folk Parodist