NMLP P-016775 · True-first precedence · minted 2026-07-04

The Cry of the Halidon

Jonathan Ryder (Robert Ludlum pseudonym) · Delacorte Press · 1974

The 1974 Delacorte printing credited to Jonathan Ryder is the genuine first. The novel was later reissued under Ludlum's own name (1996); that reissue is not the first.

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New Mexico Literacy Project — True-first precedence NMLP P-016775 for "The Cry of the Halidon" by Jonathan Ryder (Robert Ludlum pseudonym) (https://newmexicoliteracyproject.org/id/point/p-016775, CC BY 4.0, dataset DOI 10.5281/zenodo.21184548).