It turns out that I do have the file which is failing (file:///usr/share/gnome/help/clock/C/clock.xml#gospanel-3) which is the Clock Applet Manual, and it has nothing to do with the results shown when searching for 'Clock Manual' which links to the panel clock.
It turns out that I do have the file which is failing (file:/ //usr/share/ gnome/help/ clock/C/ clock.xml# gospanel- 3) which is the Clock Applet Manual, and it has nothing to do with the results shown when searching for 'Clock Manual' which links to the panel clock.