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 1966 as Killer Dolphin in the United States. The plot centres on a glove once owned by Hamnet Shakespeare, on display at a newly renovated theatre called the Dolphin. Several characters from the novel return in Marsh's final book, Light Thickens. Source: Wikipedia (en)