A monograph on Stigmaria
Short article printed in the Botanical Gazette, vol. xii, no. 2.
Knowlton, Frank Hall, 1860-1926
Photo and illustration
Photo and pen sketch of a specimen, with an image of magnified cells. Spicimen has dichotomous branching, might be Spongiophyton.
Illustrations of plant
Illustrations of a woody stem or trunk, with a sketch on tracing paper.
Letter, 11 June 1894
Letter to Sir J.W. Dawson from W.S. Gresley, written from Erie, Pa.
Gresley, William Stukeley
Letter, 1881
Letter in German to J. William Dawson from Dr. Göppert, written from Breslau.
Göppert, H. R. (Johann Heinrich Robert), 1800-1884
Letter, October 1880
Draft of a letter in J.W. Dawson’s hand, possibly to Lesquereux.
Dawson, John William, Sir, 1820-1899