“Gomphus externus” by E. B. Williamson (30 May 1908) is a public-domain (CC0) artwork, free to view, download and reuse for any purpose. It is catalogued from the open collection of Smithsonian Open Access.

Gomphus externus

E. B. Williamson

Title	Gomphus externus
Artist	E. B. Williamson
Date	30 May 1908 20th century
Medium	1
Origin	Fort Wayne, Allen, Indiana, United States Fort Wayne
Holding institution	Smithsonian Open Access
Rights	Public domain (CC0)

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Updated 2026-09-06