Note that the railway goes to the right of Smith’s house in the above map -ie the present (slippery) footpath.
Source for the above: William Smith and his Venture into ‘Stone Manufacture’
Richard T. A. Irving ;
https://combedownheritagesociety.files.wordpress.com/2010/01/william_smith_and_his_venture.pdf - a wonderful scholarly article from which I have purloined extensively.
I lived In Combe Down for 18 years and I cannot recall anyone using the name ‘Bluebell Steps’. It was always the ’66/69/70/76’ steps.