So then you have a map you can use. But if you talk to him again, he'll give you one more. And one more. And one more after that.
These maps are perfect squares, and because of that they stack on top of each other quite nicely. If you talk to him enough, you can start to build something.
Now we're surrounding him a bit (unfortunately it won't stop him if he wants to go as he'll just disappear):
Now the beginnings of a house:
If you place one map one level higher than the next, you can turn it into a staircase. Here we are talking to Scots from about eight maps high.
If you get into a fight, just run into your house...
...and stack the maps in the way. Now they can't get in. That's a Fawn guard stalking outside. Back in the day I hade something much larger than this complete with a bedroll, nightstand, candles etc. taken from the city, and would do things like run off to Monitor, strike a guard and run back into the house, board the entrance up with maps and get a good night's sleep while he raged impotently outside what used to be the entrance. In theory you might be able to cover almost every open space in Serpent Isle with them.