... and all the fun he had at Iona (as I just did), high resolution images of a ninth century manuscript of Adamnan of Iona'sVita sancti Columbae [Cod. Sang. 555] may be accessed here.
In fact, you can browse an amazing array of the holdings of the Abbey Library of St. Gall in Switzerland, in German, French, English or Italian. It's a stunning site. What a generous act to make the manuscripts so easily available.