REMOVE

1. Mongolia
2. Korea
3. South China Sea
4. Bay of Bengal
5. Erhard Bros. (Firm), engrave …
6. [ca. 1892]

WHAT

1. Bonvalot, Gabriel, 1853-1 … (1)
2. Discoveries in geography (1)
3. Printed (1)
4. Thematic Maps (1)

More 

WHERE

1. China (1)
2. Hainan Sheng (China) (1)
3. India (1)

More 

WHO

1. Erhard Bros. (Firm), engr … (1)

WHEN

1. [ca. 1892] (1)