The Northumberland report of 1968/9It can be accessed on warmwell in the two separate parts of the original - ideally as these pdf files
(If you are unable to access pdf files the major part of the marterial can still be seen below. WARNING. Unless you have a fast broadband connection, the files will be slow to appear. Do not click again.
Part TWO (particularly interesting for chapter V)
both are large files and take some time fully to appear. Not all illustrations and formatting could be successfully uploaded on the html files.