The writing you have put a question mark against is: " 211 Kilo ". This is measured from the Thailand end. However, be warned that during the war and upon further survey the Japanese engineers added no fewer than 17 kilometres to the distance of camps further north from 206 kilos so much confusion can arise ! There are experts in the field in the shape of the Thai/Burma Railway Centre who will probably help with a location you can then find with Google Maps or some other gadget I do not understand. "No 2 POW Camp Thailand" is not a specific place within Thailand but a grouping. The Allies invariably refer to Group II, or Group IV , etc.There were numerous camps, sub-camps, and mobile camps in Thailand concerned with railway construction, repair and maintenance. These "housed" POWs and civilian workers. All of the returning POWs said that the conditions faced by the civilians was far worse than they suffered, in other words, beyond description. It is not certain how many civilians died, estimates vary up to and beyond 100,000 ( one hundred thousand ) poor souls. I found the hospital records in WO 347 invaluable in finding my uncle ( died 21/9/44 ). The date your father-in-law went to Thailand may well be in WO361/2104 which I have a copy of so you can send me a PM with his name and I'll look him up.