The Helen Davis Collection of Penguins: France: 1887 15c. Peace and Commerce carte-lettre with printed advertising inside and out with insert incl. for phospho-guano (in which Humboldt Penguins make their nests), attractive early Le Monde des Oiseaux mint postcard advertising the Chocolaterie d’Aiguebelle showing Rockhopper and Magellanic penguins, also Kohler Sea Birds picture Series XX No. 9 showing Magellanic Penguins. (Image1)