Redd was a regular guest at Hull but I can't find any references to Martin. I think I must have seen them both together elsewhere, down in London perhaps. Redd was booked with Martin Carthy and Steve Benbow in February 64 and then solo in January 66 and April 69. I have a vague memory of him coming with a gang of us from Hull to look at a half sunken wooden Humber keel in Goole docks. That would be early 70s.