Changing itemprop="author"

Using the Vintage theme my client wants to change in the top of the blog previews to say " written by her name" rather than just "by her name". What file can I look in to find where to make that change?

Also she wants to remove the links in the bio area under the full post to remove the author links (View authors profile etc). I know I can turn this off in the admin but it turns off the bio as well. Where can I make this change?

http://letthelionroar.com/index.php/blog