It was an adaptation of 'The Danton Case', called 'The Danton Affair', but I hadn't read the original play at the time and it's so long ago now since I saw it I can't remember how they compare, but I think it was quite heavily adapted. I haven't read 'the Snow Palace' yet but I'm interested to see what she did with it - it's such an unusual life I'm surprised it hasn't appealed to more dramatists, but as far as I know it's the only dramatisation (?). Hilary Mantel was going to do a novel, but (as with her mooted Marat one) I don't know if she ever did - her new one's about another chap who got beheaded on the 28th July - Thomas Cromwell...