"I am writing to request the permission of Continuum 1 to publish a collection of Bertrand Russell's philosophical essays, none of which has been collected before." He proposes to entitle the volume Induction and Empirical Knowledge, Selected Writings of Bertrand Russell, 1914-1961.

"There is, I think, very good evidence that Russell considered Principia Mathematica and Human Knowledge to be his major contributions to philosophy."