-<p>If you make interesting changes, I'd be very grateful to know about
-them. Please <a href="mailto:mdw@distorted.org.uk">mail me patches</a>.
+<p>If you make interesting changes, I’d be very grateful to know
+about them. Please <a href="mailto:mdw@distorted.org.uk">mail me
+patches</a>.
+
+<p>The Javascript machinery on this page was written by Mark Wooding;
+the text was written by Mark Wooding and Gary Wooding. The data used
+to derive the computation was provided by Gary Wooding.