John MacLean is not the performer but the subject.
John Maclean (24 August 1879 – 30 November 1923) was a Scottish schoolteacher and revolutionary socialist. He is primarily known as a Marxist educator and notable for his outspoken opposition to the First World War. Maclean is regarded as one of the leading figures of the Red Clydeside era. His imprisonment for agitation against the war earned him an international reputation [Wikipedia]
‘John MacLean’s March’ – written by Hamish Henderson – describes MacLean’s return to Glasgow after his release from Peterhead Prison.
John MacLean’s March Alistair Hulett
O, for more with his principles!