John Hill Burton 
History of Scotland From Agricola’s Invasion to the Revolution of 1688 [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. It is in the year 80 of the Christian era that the territory in later times known as Scotland comes out of utter darkness, and is seen to join the current of authentic history. In that year Julius Agricola brought Roman troops north of the line which, hundreds of years afterwards, became the border dividing Scotland from England.