NMLP P-022787 · True-first precedence · minted 2026-07-04

Killer Dolphin (UK: Death at the Dolphin)

Ngaio Marsh · Little Brown · 1966

True first is the US Little, Brown edition (1966) as Killer Dolphin, preceding the UK Collins edition (1967) titled Death at the Dolphin.

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New Mexico Literacy Project — True-first precedence NMLP P-022787 for "Killer Dolphin (UK: Death at the Dolphin)" by Ngaio Marsh (https://newmexicoliteracyproject.org/id/point/p-022787, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).