Chart of the N.W. coast of America and the N.E. coast of Asia, explored in the years 1778 and 1779Roberts, Henry, 1757-1796, cartographerJuly 24, 1784.engBEIN 23 1784: Sheet measures 53 x 80.5 cm.BEIN 1982 Folio 10: Armorial bookplate: Charles Abbot. No. 33 of 42 maps bound together.Relief shown pictorially. Depths shown by soundings.Includes notes.The areas of British, Russian and Spanish discoveries are coded in Red (British discoveries), Blue (Russian discoveries) and Yellow (Spanish discoveries).