Brian Priestley's notes to "The London Collection Volume Three" say:
His association with CBS records, whose producer Teo Macero had worked with him sympathetically during much of the 1960s, had ended in mutual incomprehension. Doubtless under pressure from marketing and accountancy personnel, macero had teamed Monk with arranger/conductor Oliver Nelson, whose West Coast based studio band had destroyed the subtlety of Monk's music; and, in the absence of any new material from Thelonious himself, Macero had composed two facile Monk pastiches for the album. The next suggestion from CBS (whether via Macero is not clear) was that he record a selection of Beatles songs, a suggestion not taken up by Monk.