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https://hollis.harvard.edu/primo-explore/fulldisplay?docid=HVD_VIAolvgroup12143&context=L&vid=HVD2&search_scope=everything&tab=everything&lang=en_US
Number 127 - T.W. Ingersoll picture of A.C. Huidekoper and group.
Number 52 - Site of Gregor Lang's cabin at the mouth of the Cannonball River.
Number 230 - Site of Gregor Lang ranch ca.1919
Number 89,90 - Mrs. Margaret Roberts cabin.
Number 98 - Group of cowboys, including Johnny (Jack) Snyder
Number 104 - Slaughterhouse of the Marquis de Mores, Medora ND.