REMOVE

1. Separate Map
2. France
3. 1857

WHAT

1. Data Visualization (6)
2. Railroad (6)
3. Covers (3)
4. Statistical Diagram (3)

WHO

1. Minard, Charles Joseph, 1 … (6)
2. Regnier et Dourdet (6)

WHEN

1. 1855 (2)
2. 1856 (2)
3. 1858 (2)