Tony Cummings actually wrote three articles in 'Black Music' magazine and was also supposed to have been writing a book called 'The Strange World of Northern Soul' which was due to be published in 1976 but never was.
The first article was entitled 'The Strange World of Northern Soul' and came out in the June 1974 issue. As Dave Greet said, it started with Eddie Foster and his fictional 'dream' about Wigan. Tony visited Tiffany's Newcastle, Whitchurch Civic Hall, Blackpool Mecca and Queen's Hall, Leeds. He makes some observations about some of the DJs of the time which make quite interesting reading:
RICHARD SEARLING: Plays the Wigan Casino on Saturdays and seems to play mainly discs supplied by bootlegger Simon Soussan.
SOUL SAM: alias Mr. Martin Barnfather. The joker in the pack, playing streams of unknown pop records which just happen to have the right beat.
RUSS WINSTANLEY: The most likeable of the Wigan Casino crew, though his recent circular to fellow deejays proclaiming: "We, as the creators of the Northern Soul Scene" seems to indicate a peculiarly distorted view of black musicians.
The second article in the January 1975 issue was entitled 'Northern Soul Revisited' was mainly about the 'split' in the scene between Blackpool Mecca and WIgan Casino.
The third article was published in November 1975 and was called 'Northern Soul: After the Goldrush'. Again there are comments on Blackpool and Wigan but this time the emphasis is on 'tailor made' records, the Simon Soussan instrumentals played at the Casino and the records produced by Ian Levine played at the Mecca (although I recall hearing a number of the latter being played at the Casino. There's also a few paragraphs about Cleethorpes.
All the articles make interesting reading after 35 years.