Question: Death at the Dolphin is a detective novel by Ngaio Marsh; it is the twenty-fourth novel to feature Roderick Alleyn, and was first published in 1967, the plot centers on a glove once owned by Hamnet Shakespeare, Hamnet  was the only son of William Shakespeare and Anne Hathaway, and the fraternal twin of who?
Sentence (from "Death at the Dolphin"): Several characters from the novel return in Marsh's final book, "Light Thickens".
Relevant evidence: No