So the new theory is:
- Install the WYSIWYG module first
- and the Insert module
- and then, as WYSIWYG says, the CKEditor libraries package, not “the CKEditor for Drupal module”
First two are straightforward, download, unzip and activate. Then make a new folder sites/all/libraries/ckeditor. And get an error message which I google, to find that the latest stable version of CKEditor is not yet supported by the latest of WYSIWYG!
So ‘downgrade’ to v3.x and now the editor can be configured at admin/config/content/wysiwyg. So we have a content authoring solution but still no simple way of adding images inline as yet, nor of viewing them within the web site.