🚀 go-pugleaf

I've run into a TeX/LaTeX problem I dont understand.

I'm typesetting a book, the last chapter of which consists of a bibliography,
which I have split over two pages as follows:-


\chapter{Bibliography}
\begin{tabular}{p{40mm}p{95mm}}
Hanks \& Hodges {\AD 1988} & {\bf A Dictionary of Surnames}\\
&{\sf Oxford University Press}\\
\\
Harris {\AD 1953} & {\bf Vermuyden and the Fens}\\
&{\sf Clever-Hume Press, London}\\
\\
Korthals-Altes {\AD 1925} & {\bf Sir Cornelius Vermuyden}\\
&{\sf Williams \& Norgate, London}\\
\\
Lindley {\AD 1982} & {\bf Fenland Riots and the English Revolution}\\
&{\sf Heinemann, London}\\
\\
Morris {\AD 1895} & {\bf Makers of New York} {\it an historical work; giving portraits and sketches of the most eminent citizens of New York}\\
&{\sf L.R.Hamersley and co, Philadelphia}\\
\\
\end{tabular}
\pagebreak
\begin{tabular}{p{40mm}p{95mm}}
Ordnance Survey {\AD 1989} & {\bf Gazetteer of Great Britain}\\
&{\sf MacMillan, London}\\
\\
Pickering {\AD 1768} & {\bf Statutes at Large} {\it from Magna Carta to the End of the Eleventh Parliament of Great Britain, anno 1761}\\
&{\sf Cambridge}\\
\\
Reaney {\AD 1967} & {\bf The Origin of English Surnames}\\
&{\sf Routledge and Kegan Paul, London}\\
\\
Reaney \& Wilson {\AD 1991} & {\bf A Dictionary of British Surnames}\\
&{\sf Routledge, London}\\
\\
\end{tabular}


This worked fine until today, when some work I did on earlier chapters broke it.

It fails in one of two ways, depending on which earlier chapters I include. In each
case, I get The chapter heading on a page by itself, then I either get the
two tables vertically on one page, and an error message

Overfull \vbox (26.1184pt too high) has occurred while \output is active


Or I get the two pages horizontally on the page, ie

	---------------------------------
	!				!
	! XXXXXXXXXXXXXXXXX       YYYYYY!
	! XXXXXXXXXXXXXXXXX       YYYYYY!
	! XXXXXXXXXXXXXXXXX       YYYYYY!
	! XXXXXXXXXXXXXXXXX       YYYYYY!
	! XXXXXXXXXXXXXXXXX       YYYYYY!
	! XXXXXXXXXXXXXXXXX       YYYYYY!
	! XXXXXXXXXXXXXXXXX       YYYYYY!

		etc

with a similar error message, but complaining about Overfull \hbox.


I get the error even if I comment out the inclusion of all earlier chapters,
which I guess may mean I've put an error in the preamble, but it all looks OK
to me.

I don't understand that bit in the error message "while \output is active" --
could anyone offer suggestion as to what sort of error I might have made,
and what I should be looking for?

Thanks



--
Alan M Stanier   |   alan@essex.ac.uk   |   +44 206 872153
		  Reuninte Gondwaanaland