Browse DSIDetails of the item << Previous Next >> Wallis Robert R. W. ; 1794 in London 1878 Thomas Wallis, an assistant of Charles Heath (1785–1848) engraver Henry Wallis (1805?–1890) (brother) ; engraver William Wallis (b. 1796) (brother) taught by his father United Kingdom Map of West Canada (c. 1850) ; cartographical line-engraving https://en.wikipedia.org/wiki/Robert_Wallis_(engraver)#/media/File:1850_Tallis_Map_of_West_Canada_or_Ontario_(_includes_Great_Lakes_)_-_Geographicus_- https://en.wikipedia.org/wiki/Robert_Wallis_(engraver) 62746819
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