The Boole-De Morgan Correspondence, 1842-1864

George Boole and Augustus De Morgan carried on a correspondence over a period of some 22 years. About 90 of the letters between them have survived. The major interest in the correspondence must be the exchange of ideas on logical matters, because Boole and, to a lesser extent, De Morgan were innovators in this field. But the letters also show their interest in other mathematical matters: differential equations and probability being referred to not infrequently. The letters also contain comments on a wide range of social, literary, political, and religious matters.