the arms were dropped back to the sides of the body,
he squeezed them in against the ribs, at the same time drawing upward
toward the head and counting four each time, as he had done before. But
the lesson was abruptly interrupted by Dutchy, whose imagination was
worked up to such a pitch that I actually believe he thought he had been
drowning. Anyway, he squirmed out of Uncle Ed's grasp, and wouldn't play
patient any longer. For several days after that we couldn't persuade him
to venture near deep water.

CHAPTER IX.

BRIDGE BUILDING.

Willow Clump Island was, for the most part, a trackless wilderness, and
as soon as we had made our map we laid out roads to the different
important points. Our main highway ran from Point Lookout to Tiger's
Tail. This road was made rather winding, to add to its picturesqueness,
and from it a number of shorter roads branched off.

SPAR BRIDGE.

[Illustration: Figs. 91 and 92. Frames for the Spar Bridge.]

[Illustration: Fig 93. The Spar Bridge.]

We ran a bridge across the mill-race at its narrowest point. This bridge
was made of trees which we had cut down in making our road. It was quite
a piece of engineering, built under Uncle Ed's guidance. Two frames were
made of the shape shown in Figs. 91 and 92. The side sticks were 15 feet
long and spaced about 10 feet apart at the base by crosspieces. At the
upper end one frame was made 6 feet wide and the other 5 feet wide. The
side and cross spars were mortised together and secured by lashing a
rope around them. To make the frames more rigid we braced them with
diagonal braces nailed on. When completed we set the frames up on
opposite sides of the stream and with ropes carefully lowered their
upper ends until they interlocked, the side spars of each frame resting
on the cross spars of the other. In the angles formed by the crossing
side spars a center spar was laid, and a number of floor beams or spars
were stretched to this from the opposite shores. On these a flooring was
spread made of saplings, cut and trimmed to the right size. A rustic
railing on each side of the bridge completed the structure.

THE ROPE RAILWAY.

[Illustration: Fig. 94. The Swing Seat.]

[Illustration: Fig. 95. Tying the Ropes to the Seat.]

The mill-race was crossed further down by a rope line on which we rigged
a traveling carriage. A light manila rope was used, anchored to a tree
at each side about fifteen feet from the ground. A pulley b