I noticed that Masato's list of recordings was from an old list & missed one.In Sweetest Union Join - 96th United Convention, Henagar, AL Audio CD Recorded in 1999.
This is a great Sacred Harp recording that gets better & better the more I listen to it. The ordering instructions are at the same site as the others.
I programmed my CD player & listened to the 4 convention versions in succession several times. All are good. The "In Sweetest Union" is my favorite because it really kicks. I forgot to include the Big Singing.