The Website is a hierarchical structure
which can be accessed through the headings at the top of each page.
The left hand heading and Logo take you upwards a level in the structure.
The other headings lead you to lower levels.

Underlined text usually leads to other webpages which are outside the hierarchy,
but are used flexibly throughout.
You may return from them to the main structure using the Back button or web control arrow.

You will also find buttons that allow you to generate comments to the author using webmail.

To return to where you entered this page Click here.
or you can click on the Logo, top left, to return to the main index page.



At the top level of the hierarchy, you can access the overall Contents List.


The website consists of the personal, and often temporary, ideas of the author.
It is subject to change as these ideas develop or are discarded.
Such changes sometimes introduce technical errors,
for which my apologies!