Quote from : Reading the Waste Land: Modernism and the Limits of Interpretation Book

The decline of sustained close reading of Eliot is also related, ironically, to the emergence of historical scholarship regarding sources and allusions. The major figure here is Grover Smith, who in the midfifties published an encyclopedic study of Eliot's sources. 3 The mere existence of Smith's scholarly tome changed the shape of close readings of Eliot. The poet's allusions and sources moved to the foreground of concern, and although most readers of Eliot's poetry and plays benefited from Smith's work, others found themselves frustrated by the weight of the intellectual backgrounds.