Letters patent (no. 1471) granted to Joseph Rothery and Andrew Rothery for 'Improvements in Machinery or Apparatus for cutting coal, stone and other minerals'
Letters patent granted to Stephen Thomas Wentworth for 'Improvements in burners for consuming gas and air combined', plus ephemeral material
Untitled sketches of various machine parts such as carriage, store rack, warning arm, wedges bars and tens warning slides. Plans and elevations.