To delete a guestbook entry:

1. Go to the Create & Update tab of your GeoCities Control Panel and click the "Add-Ons" link.
2. Under "Visitor Feedback Tools," choose "Guestbook."
3. In the "Guestbook Manager" section, select "Current Posts."
4. You'll see all the posts in your guestbook. Check the box next to each post you want to delete.
5. When you're satisfied with your changes, click "Finished."