Ms, mountedon cardboard. Relief shown by shading. On verso: Karta sieverozapadnoi chasti Ostrova Khtagaluka i Guby Nucheck [Hinchinbrook Island, Alaska]. Annotations by George Davidson.
Published in [18--]. Scale is not given W146 20...
Relief shown by hachures; depths shown by soundings. Plate 17 from Sarychev's Atlas sievernoi chasti Vostochnago Okeana, 1826. "Glubina v sazheniakh s karty Vitse Admirala Sarycheva." On verso: Karta Ostrova Kocheka [Middleton Island]. Signed by...