Highly detailed map of Southeast Asia, covering the region between Formosa and Hainan islands in the North and Australia in the South.
Excellent detail in the Philippines, Indonesia and Southeast Asia.
Johor is named, but not Singapore.
Robert Wilkinson was active in London as a cartographic publisher from 1785 to 1825. He produced a number of nice works, including a General Atlas and a re-issuance of Bowen & Kitchen's English Atlas, along with excellent large format separate maps.