REMOVE

1. Philadelphia (Pa.)
2. Mitchell, Samuel Augustus

WHAT

1. Atlas Map (9)
2. World Atlas (9)
3. State Atlas (1)

WHERE

1. Pennsylvania (8)
2. New Jersey (3)
3. New Jersey (N.J.) (3)
4. United States (1)

WHO

1. Gamble, W. H. (3)
2. S.A. Mitchell (3)
3. Gordon, T. (2)
4. S.A. Mitchell, Jr. (2)

WHEN

1. 1846 (1)
2. 1848 (1)
3. 1849 (1)
4. 1853 (1)
5. 1860 (1)