Blue Mitchell was always a consistent, lyrical, and pleasing trumpeter. Although not as significant during the 1960s as Lee Morgan and Freddie Hubbard (much less Dizzy Gillespie and Miles Davis), Mitchell had his own appealing sound and was a major asset on many modern mainstream dates. This four-CD limited-edition Mosaic box set collects Mitchell's first six Blue Note dates as a leader: Step Lightly, The Thing to Do, Down With It, Bring It Home to Me, Boss Horn, and Heads Up. Three albums are by his quintet, which included tenor saxophonist Junior Cook and usually the young pianist Chick Corea and was formed shortly after he left Horace Silver, and the three others are with larger groups, two of which have arrangements by Duke Pearson. Among the other key sidemen are tenor great Joe Henderson, altoist Leo Wright, baritonist Pepper Adams, and pianists Herbie Hancock and McCoy Tyner. There are just two previously unreleased cuts (both alternate takes), but most of the sets have been somewhat rare for years, and taken as a whole, the swinging hard bop and boogaloo performances are Blue Mitchell's finest recordings as a leader.