Bright, tart, sweet and refreshing on a hot-season afternoon, this simple beverage took the edge off a long bus-ride and helped the time pass as I graded papers, filled whisper-thin aerogrammes with tiny writing, and waited for BBC World Service news to start on my radio of an afternoon. Without air conditioning to transform my immediate surroundings, I counted on an electric fan, shade, slowing down, and sipping Thai-style limeade to see me through. menow are somewhere between a lemon and a lime, tiny by comparison to the mini-football-sized lemons common in the USA nowadays, and about half the size of Persian limes we find in grocery stores. Key limes are similar, but the ones I find here are quite green, where as menow in Thailand tended to be yellow with greenish notes, and to have very thin skin. This drink is so simple yet massively pleasing. If you mix up the simple syrup and keep it on hand, you can make it glass by glass instead of by the pitcher. Do try it with the salt — it’s surprising even though you know it’s coming since you put in the salt yourself, and satisfying, especially if you are looking to beat the heat.