The acronym “HCA” in the title stands for Hornsey College of Art, the North London college which, in late May 1968, was occupied by its students and a few staff in a high-profile protest which went on into that July. What was wanted were changes in how student union funds were disbursed and how the college was run. Ultimately, barbed wire and dogs were employed to end the dispute.

In September 1955, the grandly named London Skiffle Centre set up for business each Thursday in a room above the Round House pub in Soho’s Wardour Street. A prime mover in the venture was blues acolyte Cyril Davies. Two months after the opening, Lonnie Donegan’s “Rock Island Line” was issued as a single. It was previously out as a track on a 1953 Chris Barber album. Despite the wonky timeline, the skiffle boom was on.

“In the Light of Time” was the second track on Side One of April 1995’s Further, the third album by Bristol’s Flying Saucer Attack. At the time, Further felt like a hyper-vaporous take on shoegazing infused with touches of British folk. Attitudinally and temporally, Slowdive’s February 1995 third album Pygmalion wasn’t too far.

Becoming reacquainted with what was originally titled Westlake in 1987 is a pleasure. Yes, at his own measured pace, David Westlake has issued great albums since then and his Eighties and Nineties band The Servants have been the subject of various archive releases. It is not as though he has vanished. But any reminder of his flair as a songwriter is welcome.

“March of the Flower Children” was a June 1967 B-side by Los Angeles psych-punks The Seeds. The track was extracted from their third album Future, a peculiar dive into psychedelia which was as tense as it was turned on. While the song’s lyrics referenced a “field of flowers,” a “painted castle” and a sky “painted golden yellow” the mood was jittery, unstable.

Forty-seven years ago this week, a new band called The Clash were seen by a paying audience in London for the first time. On Sunday 29 August 1976 they played Islington’s Screen on the Green cinema, billed between Manchester’s Buzzcocks – their earliest London show – and rising luminaries Sex Pistols. Doors opened at midnight. The anniversary needs marking.

The final track of Giant Steps is titled “The White Noise Revisited.” Its lyrics recount the crushing impact of a job where you “kill yourself at work for what seems nothing at all.” After coming home, “you listen to the Beatles and relax and close your eyes.”

Between the late 1950s and around 1971, Robert “Mack” McCormick (1930–2015) travelled through his base-state Texas, Alabama, Mississippi, west Louisiana and parts of Arkansas and Oklahoma looking for musicians to record. It wasn’t a random process: he covered 700 counties using a grid system, so nothing would be missed. As well as tapes, he made lists, filled notebooks and took photos. He kept everything.

Düsseldorf’s most famous band is Kraftwerk. Neu!, La Düsseldorf, and, a little later, D.A.F also helped mark-out the west German city as the home of musical boundary pushers – folks doing their own thing. Fellow Düsseldorf residents Die Toten Hosen took a different musical tack, but were as individualistic as those lumped in with Krautrock or kosmiche music. And where there’s the known, there’s also the unknown.

Restraint wasn’t the watchword. Around March 1965, Heinz was in Joe Meek’s North London recording studio taping “Big Fat Spider,” which became the B-side of his April single version of “Don’t Think Twice it’s Alright.” A run-through which didn’t end up on the record found guitarist Richie Blackmore tossing off blistering lead runs so frenzied, so spikey, so wayward they might – had the track been issued – have caused radio producers to check whether the single had a pressing fault.