My guess is that those links were to the digitrad database as it was in 2003 when the comments were posted. Note the similarity in the URL
https://mudcat.org/@displaysong.cfm?SongID=196
Song 196 is no longer Barbara Allen but it might have been back then.

Jon was working on the DT database in 2022:
https://mudcat.org/thread.cfm?threadid=171470
We subsequently had an email discussion about playing ABCs, songs missing from the Mudcat version of DT, and Songwrite files.