REMOVE

1. Discoveries in geography
2. Mongolia
3. Hainan Sheng (China)
4. South China Sea
5. India
6. Erhard Bros. (Firm), engrave …

WHAT

1. Bonvalot, Gabriel, 1853-1 … (1)
2. Printed (1)
3. Thematic Maps (1)

WHERE

1. Bay of Bengal (1)
2. China (1)
3. Hainan Sheng (China) (1)
4. Korea (1)

More 

WHO

1. Erhard Bros. (Firm), engr … (1)

WHEN

1. [ca. 1892] (1)