On the track "Galadriel", Lees played John Lennon's Epiphone Casino guitar, an event later recounted in a song on the band's 1990 album Welcome To The Show titled "John Lennon's Guitar".

In an interview with Songfacts, Keith Domone (official biographer of Barclay James Harvest with his wife Monika) said John Lees wrote "Mocking Bird" back in 1968 while he was living with the parents of his future wife, Olwen.

The song is based on a musical phrase from "Pools Of Blue", which he wrote around the same time.

[3] The credits on the original liner notes are incorrect, titles being attributed to the band as a whole.

[4] Once Again was remastered and reissued by Harvest in 2002 with five bonus tracks: 2 outtakes and 3 from the 1973 quadrophonic mix of the album.