REMOVE

1. Data Visualization
2. Transit
3. England

WHAT

1. Pictorial map (4)
2. Pocket Map (2)
3. Separate Map (2)

WHERE

1. London (2)
2. London (England) (2)

WHO

1. Beck, Henry C. (2)
2. Dunstable & Watford (2)
3. Gill, Leslie MacDonald, 1 … (2)
4. London Transport (2)
5. McCorquodale & co. ltd. (2)
6. Waterlow & Sons Limited (2)

WHEN

1. 1928 (2)
2. 1947 (2)