20 INTRODUCTION. 



next lay on four long square sticks of timber, 

 and join them together at the corners. These 

 they call sills. If a house were to be exactly 

 square that is, just as long as it is wide and 

 you were to stand up in the air, over the sills, 

 after they were laid upon the underpinning and 

 framed together, they would look a little like 

 the following figure. 



When they have placed the sills, and put 

 other pieces of timber across the inside of them, 



