F.R. Leavis once denounced the Twickenham edition of Pope’s Dunciad for producing a meagre trickle of text through a desert of apparatus, the trickle sometimes disappearing altogether. In this volume of T. S. Eliot’s letters, from 1932–1933, the footnotes, the infantry and the grunts, are the stars — shooting stars, flares with flair, illuminating apparently unpromising basic materials.