Gryphon’s merrie triptych.

Gryphon (TRANSATLANTIC, 1973)

The sound of the ’70s – the 1470s – with crumhorns a go-go, medieval originals and skilful tributes – Juniper Suite a jaunty standout.

Midnight Mushrumps (TRANSATLANTIC, 1974)

The gorgeous 19-minute title track, written for a Peter Hall production of The Tempest, blends folk ancient and modern with prog ambition. Sounds as good now as anything from the era.

Red Queen To Gryphon Three (TRANSATLANTIC, 1974)

Four instrumentals loosely follow a chess game with electronic textures dominating over acoustic. Complex, clever, with the clout to satisfy a hall full of rock fans.