Mike Heron, founding member of The Incredible String Band, recorded these folk-rock sketches in 1987 in stripped-down fashion. Acoustic guitar and subtle arrangements support introspective songwriting influenced by his experimental folk background. The Glenrow Tapes capture pure performance—Heron's distinctive vocal timbre and fingerpicking are front and center, unadorned. His unconventional song structures and poetic lyrics appeal to fans of both his ISB era and solo work. This rare cassette-only release deserves attention from folk-rock collectors and anyone interested in progressive folk traditions.