Black Easter
Together , those two novellas form the third part of the thematic "After Such Knowledge" trilogy ( the title is from a line of T . S . Eliot's "Gerontion": "After such knowledge , what forgiveness ? " ) with "A Case of Conscience" and "Doctor Mirabilis" . 
<triplet> Gerontion <subj> T. S. Eliot <obj> author <triplet> A Case of Conscience <subj> Doctor Mirabilis <obj> followed by <triplet> Doctor Mirabilis <subj> A Case of Conscience <obj> follows