@Seamus Oh the joy of being a mathematician! You can wriggle out of anything! It's just clicked that actually, I was getting my delta's mixed up. But of course, because the question was ill-defined, I just change my assumptions and, hey presto! My answer stays correct. All the fun of philosophy with none of the dangerous bits.
@AndrewStacey Hey, I resemble that remark. Linguists are scientists (at least my sort). Are mathematicians? :-) Anyway, to answer Paulo's request, I've been pondering the idea.
@AlanMunn *wonders how someone can resemble a remark; thinks: "Strange how these linguists change the language; almost mathematical in its Humpty-Dumptyism."*
We didn't want to be scientists. We wanted to be... lumberjacks! Leaping from tree to tree, as they float down the mighty rivers of British Columbia. The Giant Redwood. The Larch. The Fir! The mighty Scots Pine! The lofty flowering Cherry! The plucky little Apsen! The limping Roo tree of Nigeria. The towering Wattle of Aldershot! The Maidenhead Weeping Water Plant! And so forth...
@MartinScharrer On a more serious note, do you know why \clearpage is necessary to associate a pagestyle correctly. e.g. \pagestyle{empty}\tableofcontents\pagestyle{headings} yields 'headings' on the TOC not empty.
@PauloCereda Where's @JosephWright when you need him?
(However, the header is written on the page before the text box with the content is placed on it, so any special stuff (e.g. TikZ overlay) is placed behind it.)