This volume continues the Naxos series of Rubinstein’s ‘middle period’ Chopin recordings, begun with the Piano Concertos (8.111296) and followed by the Polonaises (8.111346). Because the HMV/Victor catalogue already included Cortot’s complete traversal of the Waltzes (8.111035), Rubinstein set down only two of them on shellac before making this complete recording in 1954. He had made previous recordings for RCA of two of the Impromptus (Opp. 51 and 66) before taping the four new versions heard on this disc.