I wonder about the release date of The Iron Muse. All factual evidence point to 1963. The Mustrad Topic Records discography places it amongst a handful of other albums released in 1963; the sleeve notes of Anne Briggs: A Collection state it was released in March 1963; it grew out of the Centre 42 project which ran in the beginning of the 1960s; and my copy of the LP says on its beige record label: "first published 1963 by Topic Records Ltd".

But the sleeve notes of the Iron Muse CD say: "As far back as 1956 Topic Records released the original vinyl album which bore the same name as this one." And I have been shown a copy of the Iron Muse LP that says on it blue record label: "First published by Topic 1956". Anne Briggs was 11 at that time...

Where does the date 1956 come from?