British Crown colony covering the island of Ceylon, beginning with the capture of Dutch maritime provinces and expanding to the whole island after the fall of Kandy in 1815.
Granted independence as the Dominion of Ceylon on 4 February 1948; the modern Republic of Sri Lanka (Q854, already in canonical dataset) dates from 1948/1972 depending on convention.
The atlas holds 3 border frames for British Ceylon — the shape you scrub through changes in 1796 · 1873 · 1934.
The standard modern history of the island, covering the British Ceylon period in depth, in print from Penguin/Vijitha Yapa.