Antique Map - Walter Graham Blackie - Map of United States of North America - G3"The United States of North America, Atlantic States and Valley of the Mississippi" This hand coloured map is from Walter Graham Blackies "Blackie & Sons". The work was published in London, 1893. Walter Graham Blackie (18161906) was a Scottish publisher and academic. He led the family publishing firm Blackie & Son, which specialized in educational and children's books, as well as atlases and maps. Blackie was also an active member of scientific