[Newbies] Ralph Johnson video lectures on Smalltalk

[Michael Davies]

I've just found a link to a set of videos and lecture notes from Ralph
Johnson's lectures on Smalltalk (based on VisualWorks I believe):
http://st-www.cs.uiuc.edu/users/johnson/cs497/notes98/online-course.html
The lecture notes are accessible, but the video links seem to be dead.
Does anyone know if they are still accessible anywhere?