REMOVE

1. Macao (China) -- Maps
2. Sea Charts
3. Guangdong Sheng (China)
4. Macao (China)
5. Pearl River Estuary (China) …
6. [17--]

WHAT

1. China -- Maps (1)
2. Macao (China) -- Maps (1)
3. Manuscripts (1)

WHERE

1. Guangdong Sheng (China) (1)
2. Macao (China) (1)
3. Pearl River Estuary (Chin … (1)

WHEN

1. [17--] (1)