Papyri, ostraka, inscriptions and printed texts, some ancient, some mediaeval, and some subsequent to the Fall of Constantinople, bring to light almost daily a multitude of hitherto unknown words; words which complete or enrich our knowledge of the language, history, life, and civilisation of the Greeks throughout the ages. The discovery of a single word indeed may throw light upon much that was unknown or doubtful, and provide a key for a wide range of connected problems. Of the importance of collecting these words there can therefore be no doubt. Many scholars have from time to time set their hands to this work; sometimes, like S. Koumanoudis and Van Herwerden, by publishing supplementary dictionaries, sometimes by appending glossaries to their editions of texts. Stuart-Jones and Mackenzie's new edition of Liddell and Scott records new words, to the obvious advantage of those who consult it.