His first LP, from 1980. Al Campbell productions recorded with Sly & Robbie at Channel One; mixed by the hubristic teenager at King Tubby’s. Great stuff… but a non-scientific title.

Ten killer dubs of Barrington Levy, mixed at Tubby’s, mostly unreleased. (The album was shelved in late 1980.)

Ruthlessly brilliant dubs of classic Linval Thompson productions like Wayne Wade’s Poor And Humble and Johnny Osbourne’s Kiss Somebody. Courtesy of the Roots Radics at Channel One, by way of Tubby’s. De Materialize puts it perfectly.

Magnificent do-over of Dennis Brown’s classic Foot Of The Mountain. A TG Binns production from mid-seventies New York. Murder.

Late-eighties Callo Collins production of the Youth Promotion cohort.

Aka Olive Grant — the same Senya who broke through at Randys in 1974 with Oh Jah Come and Children Of The Ghetto — with The Wailers backing.

This beautiful acoustic cut is previously unissued. Raw soulful lovers, with close-harmony backing, and double bass and guitar as irresistible as Egyptian Reggae. Terrific.

Anthony Maher’s 1988 dub album, an Australian commingling of JA science and UK post-punk and Industrial.

The Don in full flight over late-nineties Bunny Gemini. Plus a Yami Bolo, and both dubs.

Gospelised roots, produced by Delroy Collins in the late 1990s, with mixes by the Disciples.

Excellent mid-seventies roots by this singer from Jack Ruby’s Hi Fi.

Scientist, Roots Radics.