Philosophy
The Cambridge Dictionary of Philosophy
B41.C35 1999
The Encyclopedia of Philosophy
REF B41.E5 1972
The Oxford Companion to Philosophy
Routledge Companion to Philosophy of Literature
Mythology
Encyclopedia Mythica
A searchable database of mythical personae, mostly text but with some images.
The Gods of the Greeks
BL781.K363 1974
Dictionary of Classical Mythology
BL715.G713 1987
Oxford Companion to World Mythology
Oxford Classical Dictionary
REF DE5 .O9 2012
History
The Oxford Companion to British History
Dictionary of Ancient History
DE5.D53 1994t
Dictionary of Eighteenth-Century World History
D286.D53 1994t
Dictionary of Modern History, 1789-1945
D205.P34 1962 (Lederman Law Library)
A Dictionary of British History, 1815-1973
DA529.H83
Penguin Dictionary of Twentieth Century History
D419.P29 1983
Dictionary of Twentieth-Century History, 1914-1990
D419.T44 1992
The Timetables of History: a Horizontal Linkage of People and Events
D11.G78 1982
The OED, as it is known, is the most comprehensive and authoritative dictionary of the English language. As a citations dictionary, it quotes sentences used by authors to illustrate the history of usage beginning with the earliest known usage of each word.