Location of home link (in header) code?

I need move the home link down lower in the header (manuscript theme), but for some reason I can't find the location of the code that displays that link. I have to admit that I'm new to Drupal, and have been away from any substantial webmastering for a couple of years, so I'm at a bit of a disadvantage. If I can just locate the correct file I should be able to handle the rest. A pointer in the right direction would be greatly appreciated as I've spent many hours looking with no success.