I find that the stories behind the writing of many of these songs is of great interest, a good example being "Three Score and Ten".   My listeners agree and I get many favourable comments about my introductions and my liner notes. Saying a song is "traditional" tells you very little if anything about it. Incidently I found "Rose of Allendale" in an old book and was quite surprised to hear it on the folk scene.
Back to the source! - Back to the source! Before you move ahead. I say! And credit where credit's due! Joy