Ye Yaille Chere came out in 1990. Octa Clark had recorded well before then. He had two songs on J'etais au bal, Music from French Louisiana, which came out in 1974. I posted a link yesterday to a website by Ron Stanford, the producer.

http://www.hechicero.com/louisiana/octaclark.html

This website includes a mention of Octa Clark's live radio show. I also heard about his radio show from the lp Ensemble Encore for Rounder.

He and Hector Duhon were playing at Festivals Acadiens (Tribute to Cajun Music) in the late 70s. I know because I saw them. Beausoleil used to feature them too at some concerts because their accordion player, Bessyl Duhon, is Hector's son. The Arhoolie lp came out in 1981, I believe. That may be how some people first heard about him. This is all before Ye Yaille Chere was published.

I think he's not in Ye Yaille Chere because it is mainly a book of lyrics. Octa Clark's greatest originals were instrumentals. That's my guess on why he is not included.

And he's not nearly the only well known player not included.