 A number of mid-to late 19th century encyclopedia were published based on the "Penny Cyclopaedia" 

The "National Cyclopedia of Useful Knowledge" was published by Charles Knight in 12 volumes between 1847 and 1851.A second edition in 13 volumes was published between 1856 and 1859 by George Routledge.The work was then sold to the firm of W. Mackenzie who published it as the "National Encyclopedia" in 14 volumes in 1867, the final volume of which was a world atlas.