sentences:  Hammerstein (1870–1941), who arrived in the region in 1897, promoted the Athabaska tar sands for over forty years, taking photos with descriptive titles such as "Tar Sands and Flowing Asphaltum in the Athabasca District," that are now in the National Library and National Archives Canada.Photos of the Athabaska tar sands were also featured in Canadian writer and adventurer, Agnes Deans Cameron's, best-selling book entitled "The New North