Complete Royal Roost Live Recordings, Volumes 1-4
These are all four volumes. For the purposes of jdisc, it hasn't really made sense to separate issues into discs, but you can find which are on which volume on losin's website. Also, Losin lists an 8th track from 2/19/1949 in the entry for the issue, but the entry for the session has only 7 tracks. Most likely it's just a mistake, as there is both an announcement and a song on the 7th track, so it could be called either an announcement or a song.