Anna Atkins, 1843, October (Part I), Introduction to "Photographs of British algae: cyanotype impressions", Part I, [Photographs of British algae: cyanotype impressions. Part I], Cyanotype, NYPL - New York Public Library, LL/39578
Anna Atkins 1843, October (Part I) Introduction to "Photographs of British algae: cyanotype impressions", Part I [Photographs of British algae: cyanotype impressions. Part I]
"The difficulty of making accurate drawings of objects so minute as many of the Algae and Confervae has induced me to avail myself of Sir John Herschel's beautiful process of Cyanotype, to obtain impressions of the plants themselves, which I have much pleasure in offering to my botanical friends."