Beautiful Isle O'er the Sea was never released by the Stonemans. Even though the Caerter were in Bristol there is no proof they learned the song at that time.

It's possible that the chorus is built from George Copper's song Beautiful Isle of the Sea. http://memory.loc.gov/cgi-bin/query/D?dukesm:2:./temp/~ammem_qQ91::@@@mdb=mcc,gottscho,detr,nfor,wpa,aap,cwar,bbpix,cowellbib,ca

Since the song was found in the region and the Stoneman's knew it, the Carter's claim for authorship is doubtful. Looking at Beldens "Beautiful Isle O'er the Sea" will help.

Richie