Finally, the Gorse Fox has managed to get some code working. All it does is authenticate against this blog and then read the various blog posts. Even then, the Gorse Fox did not write the code. He found an example, which didn't immediately work, but after some faffing about the Gorse Fox managed to find all its prerequisites and get it to run.
Now that he has a working example, he can move forward... he can now read this blog, but next he has to work out how best to write to the target blog (which uses Wordpress, rather than blogger).
One step at a time.
(Chappy came this morning to look at running data cables for the Gorse Fox. Unfortunately, it is not as simple as originally thought. Having said that, the Gorse Fox thinks he has found a Plan B, which should mean easier routing.)