In early 1973, when King Crimson performed "Book of Saturday"—a track from their album "Larks' Tongues in Aspic"—they were riding a wave of transformation, both musically and in their lineup. Released just days prior, on March 23, 1973, "Larks' Tongues in Aspic" marked a significant evolution for the band, as it showcased a shift toward a more experimental and progressive sound, incorporating elements of jazz, rock, and avant-garde. This was also a period that saw drummer Bill Bruford and new bassist John Wetton teaming up, which brought a fresh intensity to their live performances. The London show in January was part of their ambitious tour to promote this ground-breaking work, which would eventually solidify their reputation as pioneers of progressive rock. Interestingly, this era also captured their intricate blend of poetry and complex arrangements, encapsulating the emotional depth that fans have come to adore. It's a beautiful snapshot of a band on the cusp of innovation!