Page 27 of A Field Guide to Henders Island by Geoffrey Binswanger-Duckworth, Nell Duckworth-Binswanger, and Andrew Beasley, 1^st edition.

Page 39 of A Field Guide to Henders Island by Geoffrey Binswanger-Duckworth, Nell Duckworth-Binswanger, and Andrew Beasley, 1^st edition.

Map of Henders Island

Preliminary sketches of a spiger by Nell Duckworth on board Trident, August 26—“motion studies.”

Preliminary sketches of a spiger by Nell Duckworth on board Trident, August 27—“speculations on internal structures.”