Charles Darwin Signature with Sentiment.

DARWIN, CHARLES ROBERT. 1809-1882. A signature clipped from a two-sided letter page in black ink, reading: "With my sincere thanks, your truly obliged Charles Darwin"; 1 15/16" x 4 1/8". The text fragment verso in Darwin's hand includes the name "Mr. Herbert Spencer," the English philosopher/biologist/sociologist etc. who coined "survival of the fittest." Condition: fine, with slight horizontal fold creases; adhesive remnants verso. Provenance: Private Collection; acquired from Stanley Gibbons, Guernsey, 2007.