Preparations. Through June 12 (Philip H. Sheridan to George W. Cass ; W. Milnor Roberts to Cass ; Roberts to Thomas L. Rosser and Cass ; Montgomery Meigs to his family ; Rosser's diary, May 22-June 12 ; Luther Bradley's diary, May 22-June 13 ; Bradley to his wife ; Edward Konopicky to his parents ; Newspaper articles) ; June 13 through June 17 (Samuel J. Barrows to the New York Tribune ; New York Times ; Roberts to Cass ; Edward Konopicky to his parents ; Col. David S. Stanley's memoirs) ; June 18 and 19 (Barrows to the Tribune ; Bradley's diary and letter, June 13-19 ; Rosser's diary and letters, June 13-19 ; Report of Augustus W. Corliss) -- To the Yellowstone. June 20 through July 7 (Barrows to the Tribune ; Rosser's diary, June 20-July 7 ; Rosser to his wife ; Bradley's diary, June 20-July 7 ; Bradley to his wife ; Meigs to his family ; Sioux City Journal ; Konopicky to his parents) ; Mid-July (Barrows to the Tribune ; Bradley's diary, July 8-26 ; Bradley to his wife ; Rosser's diary, July 8-23 ; Phelps's interview with Custer and Rosser ; Custer's "arrest" ; Konopicky to his parents) ; Late July (Barrows to the Tribune ; "Grant's perilous ride" ; Meigs to his parents ; Bradley's diary, July 27-August 3 ; Rosser's diary, July 24-August 19 ; Charles Loring Brace to the New York Times) -- Fighting on the Yellowstone. Custer ambushed, August 4 (Barrows to the tribune ; Konopicky to his parents ; Bradley's diary, August 4-10) ; Sitting Bull attacks, August 11 (Barrows to the Tribune ; Konopicky to his parents ; Bradley to his wife ; Bradley's diary, August 11-18 ; Meigs to his parents ; A.L. Berry's "remembrance") ; Return to Bismarck and Fort Lincoln (Konopicky to Dr. Franz Steindachner ; Bradley's diary, August 19 through October 1 ; New York Tribune ; Bismarck Tribune ; Rosser's Tribune ; Rosser's success ; Sioux City Daily Journal ; Philadelphia Evening Bulletin ; Eckelson's report to Rosser ; Army and Navy Journal).