Highgate viewed from Parliament Hill with a flock of sheep grazing in the foreground, antique print published 1893 from ‘London City Suburbs’ by The Leadenhall Press Ltd with illustrations by William Luker, Jnr (1867–1951) engraved by Charles Guillaume.
Lithography (from Ancient Greek λίθος, lithos, meaning ‘stone’, and γράφειν, graphein, meaning ‘to write’) is a method of printing originally based on the immiscibility of oil and water. The printing is from a stone (lithographic limestone) or a metal plate with a ball grained surface. It was invented in 1796 by German author and actor Alois Senefelder as a cheap method of publishing theatrical works. Lithography can be used to print text or artwork onto paper or other suitable material.