REMOVE

1. North Dakota
2. Minnesota
3. Manitoba

WHAT

1. Atlas Map (2)
2. World Atlas (2)

WHERE

1. Illinois (2)
2. United States (2)
3. Chicago (Ill.) (1)

WHO

1. Gamble, W.H. (2)
2. Mitchell, Samuel Augustus … (2)
3. S.A. Mitchell Jr. (2)
4. U.S.C.S. Dept. (2)
5. Williams, W. (2)

WHEN

1. 1868 (2)