: This retrospective piece breaks down Henderson's discography, including the 1968 live recording with Wynton Kelly (piano), Paul Chambers (bass), and Jimmy Cobb (drums).
: While not exclusively about Four! , this article by Don Byron offers a technical deep dive into Henderson's unique improvisational style, explaining why his playing sounds "episodic yet cohesive". Album Context
: April 21, 1968, live at the Left Bank Jazz Society in Baltimore.
If you are looking for an insightful article or review of this specific performance, the following resources provide the best context: Key Articles & Reviews
: 1994 via the Verve label (long after the 1968 recording date).