The William Henry Fox Talbot Catalogue Raisonné

Sixth in a group of twelve experimental test patches

Fifth in a group of twelve experimental test patches

Seventh in a group of twelve experimental test patches

Botanical specimen, fern frond

[experimental image with sharply delineated density lines]

Copy of printed text, possibly and experimental example

Copy of a circular pattern, possibly glass

China vase, one minute exposure

Created: 19 Oct 1840

Possibly an experimental negative

Possibly disk of the sun or moon in telescope - experimental image