Ted's eyes grew round and triumphant at the suggestion.
"But how can it be done?" he asked
"Won't we have to wait till the tide does it for us?" and his tone dropped gradually from elation to dejection.
"Not much!" said Will, turning back to the dike. "Just look here a minute!"
Seating himself on the dike top, he took a book from his pocket and began making rough diagrams on the fly leaf.
[Illustration: Diagram of Warping Dykes.]
CHAPTER III.
A PIECE OF ENGINEERING.