Sir William Smith was an English lexicographer who lived from 1813 until 1893.
His most famous dictionaries are:
A Dictionary of Greek and Roman Antiquities (1842)
A Dictionary of Greek and Roman Biography and Mythology (1849)
A Dictionary of Greek and Roman Geography (1857)
To take a look inside one of Smith's dictionaries feel free to follow the link.
Bibliography:
Smith, William. Dictionary of Greek and Roman Biography and Mythology. London: Taylor and Walton, 1844. The Ancient Library. Web. 06 Oct. 2013 <http://www.ancientlibrary.com/smith-bio/>.