This addition to the T.C. Power Papers includes a transcript of a diary (1867) of Power's trip up the Missouri River by steamboat; a subject file, including files on his prosecution in 1873-1874 for alleged fraud in his dealings with the Blackfeet Indians and with the U.S. government, on his Senate career, the construction of his house in Helena and other matters; miscellany; and clippings. There are subgroups for the settlement of his estate and for his wife Mary Flanagan Power, including a minute book for the Helena Art Club, inventories of home furnishings, a diary of a trip abroad in 1889, and other items.