W. M. Flinders Petrie 
Abydos [PDF ebook] 
1903

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. The broad result is that ten different temples can be traced on the same ground, through about twenty feet difference of level each temple built on the ruins of that which pre ceded it, quite regardless of the work of the earlier kings.