The best way to learn the hut pattern is to use the map editor program to create a map that is all land. The pattern is obvious once you see it. Give it a try.
Ming, I read your previous mention of this pattern from mining the archives (I think it was the OCC1 thread where the one city game evolved, fascinating reading on a civ II variety evolving with each post). Although there is a sort of parallelogram pattern of 4 to 5 squares a side it is not that regularly repeated even allowing for the presence of water. I suppose even then if you get two "hut points" you've got a kind of hunch for where the other two could be?
If you take a hard look at the pattern, it is always consistant. With the exception that the pattern doesn't cross the 0 map coordinate. If you find one hut, you can start "guessing"... once you have found two groups of 4 huts, the whole pattern is available to you. I always hate it when a single ocean square in the middle of a large land mass costs you a hut