Mention that the archive history file has the wal start/stop file names.

doc/src/sgml/backup.sgml

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-$PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.76 2005/11/07 17:36:44 tgl Exp $
+$PostgreSQL: pgsql/doc/src/sgml/backup.sgml,v 2.77 2006/02/24 14:03:01 momjian Exp $
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 <chapter id="backup">
  <title>Backup and Restore</title>
@@ -744,12 +744,13 @@ SELECT pg_stop_backup();
     <function>pg_stop_backup</> and the archiving of all WAL segment
     files needed to make the file system backup consistent.
    </para>
+
    <para>
     The backup history file is just a small text file. It contains the
     label string you gave to <function>pg_start_backup</>, as well as
-    the starting and ending times of the backup. If you used the label
-    to identify where the associated dump file is kept, then the
-    archived history file is enough to tell you which dump file to
+    the starting and ending times and WAL segments of the backup.
+    If you used the label to identify where the associated dump file is kept, 
+    then the archived history file is enough to tell you which dump file to
     restore, should you need to do so.
    </para>