Linking and Photos: Permission Needed?

Dear Rich: On my not-for-profit pages and hopeful e-book, if I provide a link to another website's page and show a photo from their page, do I need also to gain permission? The Dear Rich Staff reports that (1) no, permission is not needed for the link to the page and (2) yes, permission is needed for reproducing the photo (unless perhaps you are reproducing thumbnails, in which case it may be excused). We assume you don't need the legal backstory for all this but if you do, you can read about it here.