I have managed to wangle my way into an international conference on Charles Dickens, to give a talk and a demonstration of Punch and Judy.
Mr Geoff Felix very kindly gave me a few extra references, including Dickens's article "Punch and the Puppets".
Checking the web, I came across the article in the original form, in the journal "All the Year Round".
If anyone is interested, here is the adobe version: http://repositories.tdl.org/ttu-ir/bits ... sequence=1.