Secret of the Immortals

From Author Wars - https://authorwars.com/books/secret-of-the-immortals-84283.html

Overview:

Title: Secret of the Immortals
Author: Daniel F. Galouye
Year: 1954
Type: Short Fiction

Variant Titles:

1967. Das Geheimnis der Unsterblichen

Editions/Publications:

Unknown. Imagination, April 1954 (Unknown, Daniel F. Galouye, Greenleaf Publishing Company, $0.35, 132 pages, digest, MAGAZINE)