http://apoundforabrown.blogspot.com: This 5-CD set reissues the important free jazz albums Old/Quartet (Roscoe Mitchell), Numbers 1&2 (Bowie/Mitchell/Jarman/Favors) and Congliptious (Roscoe Mitchell Art Ensemble), plus unreleased recordings taken from rehearsals by the members of the group that would by 1969 become known as The Art Ensemble of Chicago.