In 1853 and 1854 patents for the preparation of this substance from petroleum were obtained by Warren de la Rue, and the process was applied to the " Rangoon oil " brought to Great Britain from Yenangyaung in Upper Burma.
After holding various commands he commissioned the "Larne," 20, for the East Indies and was senior naval officer at Rangoon during the Burmese War from May to September 1824.
This delta, which includes the districts of Bassein, Myaungmya, Thongwa, Henzada, Hantha waddy, Tharrawaddy, Pegu and Rangoon town, consists almost entirely of a rich alluvial deposit, and the whole area, which between Cape Negrais and Elephant Point is 137 m.
There is, however, one true river of some size, the Hlaing, which rises near Prome, flows southwards and meets the Pegu river and the Pazundaung creek near Rangoon, and thus forms the estuary which is known as the Rangoon river and constitutes the harbour of Rangoon.
East of the Rangoon river and still within the deltaic area, though cut off from the main delta by the southern end of the Pegu Yomas, lies the mouth of the Sittang.