[1] Pre-war Chicago blues vocalist and harmonica pioneer John Lee "Sonny Boy" Williamson first recorded it in 1937.

[6] Memphis one-man-band Joe Hill Louis recorded an electric version titled "Good Morning Little Angel" in February or March 1953.

[10] Although they use the phrase "good morning little schoolgirl", the song has different chord changes and lyrics, including references to popular dance styles of the time.

[11] The group's guitarist Eric Clapton explained in an early interview: [The Yardbirds were] working about every single night of the week.

This was not something I felt just about the Yardbirds, but about other bands that I admired, like Manfred Mann, the Moody Blues, and the Animals, all of whom were far better live than they were on recordings.

[12] On the live version, Clapton and bassist Paul Samwell-Smith provided the vocals instead of lead singer Keith Relf.

Demarais" (Dee Marais, a Shreveport, Louisiana, record label owner/distributor and business associate of Leonard Chess), although some later reissues list Sonny Boy Williamson as the songwriter.

In an album review, Jim Newsom noted the seven-minute version included "reworked lyrics leaving little doubt as to what the singer had in mind for the title character".