Images:

1. Credit/Permission: Anonymous photographer, before or circa 1914, (uploaded to Wikipedia by User:SreeBot, 2011) / Public domain.
   Image link: Wikipedia: File:WilliamParsonsBigTelescope.jpg.
   
2. Credit/Permission: anonymous photographer, before 1926 (uploaded to Wikimedia Commons by User:Rubinbot, 2009) / Public domain.
   Image link: Wikimedia Commons: File:John Dreyer.gif.
   

Local file: local link: telescope_leviathan.html.
File: Telescope file: telescope_leviathan.html.