Figure 29 is inserted here to suggest the variety of clever ways in which colonial craftsmen fitted wood pieces together. Such junctions are called mortise and tenon joints. They are cut with a chisel and mallet. One can well imagine the satisfaction derived by the craftsman in deciding upon the particular kind of joint to cut. When the two pieces fitted together perfectly, a hole was drilled through them with an auger, a peg was cut and driven into the hole, and the proud workman moved on to the next joint. Sometimes, in details such as windows and cabinets, the pegs are as narrow in diameter as the lead in a pencil, but are fitted so perfectly that one must look hard to find them.
Figure 30 concerns the attic of a colonial house. This diagram shows the fascinating mortised and pegged joints on display at the Sloop Point house, which will be mentioned later. At floor level a rafter is cut and locked with a floor beam. At the ridge of the roof two rafters are beautifully mortised and pegged together.
When visiting an old house, it is often rewarding to ask the owner what he knows about its construction details. Sometimes under a stairway or along a damaged plaster wall one may see into the skeletal structure. Walls are not always hollow as in the Palmer house; sometimes they are filled with brick or clay bats, thus recalling medieval construction. Basements, as well as attics, are good places in which to find hewn joints. On the outside of a house the trim at the corners and at the roof should be studied. The problem on the outside is _water_--rain water which may get into the ends of a piece of wood, or into joints, thus causing rotting. This problem should be kept in mind when examining the trim on a house; colonial builders were very aware of it.
[Illustration: FIGURE 31. THE CUPOLA HOUSE, EDENTON]
Figure 31, the Cupola House in Edenton, is one of the oldest remaining wooden frame houses in North Carolina. It is famous for its exterior with cupola and overhanging second story, and for its interior rooms, lavishly carved. Sauthier's map of Edenton clearly shows the house facing its own wharf on the bay, a fine view of which can still be had from the cupola. The house is dated between 1724, when Richard Sanderson purchased the lot "unimproved," and 1726, when he sold the lot with a house on it. Toward mid-century another owner installed the carved interiors. At present the building serves as the Edenton Public Library.