--- a/doc-src/TutorialI/preface.tex Mon Dec 15 16:38:25 2003 +0100
+++ b/doc-src/TutorialI/preface.tex Mon Dec 15 17:08:41 2003 +0100
@@ -50,7 +50,7 @@
Isabelle's \hfootref{http://isabelle.in.tum.de/}{web site} contains links to
the download area and to documentation and other information. Most Isabelle
sessions are now run from within David Aspinall's\index{Aspinall, David}
-wonderful user interface, \hfootref{http://www.proofgeneral.org/}{Proof
+wonderful user interface, \hfootref{http://proofgeneral.inf.ed.ac.uk/}{Proof
General}, even together with the
\hfootref{http://x-symbol.sourceforge.net}{X-Symbol} package for XEmacs. This
book says very little about Proof General, which has its own documentation.