Fig. 162). Dotted lines indicate the division E on the
inside.

[Illustration: FIG. 161--Cut short slits on the end of the ceiling
cards.]

The second story must be built entire before it can be fastened on top
of the first story.

Make each of the four walls of the second story three cards long. Cut
divisions on both ends of the middle card to fit in the end cards (Fig.
163).

When cutting divisions, always fit together the two cards that are to be
joined, and cut through the double layer, which will insure having the
divisions alike.

When the four walls are ready to be put together, cut a window in the
two end cards of the wall which you intend for the front (Fig. 164).
Only the lower edge and sides of the window may be cut; the upper edge
is merely bent and throws the solid window shutter, formed of the piece
cut, outward, as shown in the photograph.

Slide the four walls together and add a fifth wall, to run through the
centre from side to side, for strength. Use the long slit method for
joining the centre wall to the side walls.

When built, turn the second story upside down and fit a strip of three
cards, bridge-like, over the centre from front to back, and fasten it to
the bottom of the walls as you attached the ceiling of the first story;
then fit on another strip in like manner over the centre from side to
side, and fasten it to the bottom of the side walls. The two strips will
cross each other at their centres, one lying at right angles over the
other.

[Illustration: FIG. 162--Fasten ceiling on lower story by sliding the
centre division inside, and the two side divisions outside, the wall.]

[Illustration: FIG. 163--Middle card for wall of second story.]

Carefully lift the second story and adjust it squarely and evenly on top
of the first story, as in the photograph (Fig. 156).

[Illustration: FIG. 164--Walls for second story. Details of the
visiting-card houses.]

Make the projecting roof of the second story of four strips of four
cards each. Run the strips from side to side of the house and lap them a
trifle, one over the other. The roof is merely laid on and is supported
by the walls.

The peak is made of two strips of two cards each, and slid into a base
of one strip of three cards by means of long slits. At the apex the
cards are also fastened together with long slits.

The little summer-house in Fig. 156 has each of the four sides made of
one card. The cards are fastened together by