REMOVE

1. World Atlas
2. England
3. Ireland
4. 1850

WHAT

1. Atlas Map (5)
2. Composite Map (2)
3. Paleontology (2)
4. Data Visualization (1)

WHERE

1. Wales (6)
2. Scotland (5)
3. British Isles (3)

WHO

1. Johnston, Alexander Keith … (3)
2. W. Johnston (3)
3. William Blackwood (3)
4. Bar, J.C. (2)
5. Berghaus, H. (2)

WHEN

1. 1851 (2)
2. 1845 (1)
3. 1849 (1)