I have been trying to locate some on-line references (e.g. Wikipedia) to answer this question, but so far I've been unsuccessful. I'm hoping there are enough Andaman "experts" here on SB that can enlighten me, and perhaps provide a URL or link that has information on the Similans' history, and when exactly was it a Malaysian territory, and when did it become Thai? I also heard that the reason the Similans were "given over" to Thailand was because of a lost bet? Again, I cannot find any specifics or historical data on this, so if somebody can assist me I'd be most appreciative. HMB