Adomnan, ninth abbot of Iona, wrote his book, On Holy Places (De Locis Sanctis), in the closing years of the seventh century. It is a detailed account of the sites mentioned in the Christian scriptures, the overall topography, and the shrines that are in Palestine and Egypt at that time. It is neatly broken into three parts: Jerusalem, the surrounding areas, and then a few other places. The whole has a contemporary and lively feel; and the reader...