Complex sentence: Descendant, Theodore Wratislaw's knowledge of classical Greek was extensive, having previously edited and corrected Thomas Taylor's translation of "Plato's Republic", copies of the Wratislaw edition now only available when printed to individual order in the USA.
Split into simpler sentences: Descendant, Theodore Wratislaw's knowledge of classical Greek was extensive. He edited and corrected Thomas Taylor's translation of "Plato's Republic", copies of the Wratislaw edition now only available when printed to individual order in the USA.