Selden Map

The Chinese title 東西洋航海圖 (Dongxi yang hanghai tu: "Navigation Chart of the Eastern and Western Oceans") has been proposed by Chen Jiarong.

The historian Timothy Brook favors an earlier date, based on his argument that John Saris obtained the map in 1608 and brought it back to England in October 1609.

[6] Robert Batchelor argues for a later date of around 1619, noting that certain features on the map, such as the detailed depiction of two landings on Taiwan, indicate knowledge not held prior to the 1610s.

[9] According to the East India Company factor Richard Cocks, Li Dan had spent time as the head of the Chinese community in Manila, before being imprisoned by the Spanish and later escaping to Nagasaki.

After the back was removed in 2011 as part of restoration by Robert Minte and a team of experts, a draft of the main route running between Nagasaki and Pahang was revealed along with hash marks indicating the rule used for determining the length of lines.