On
the contrary, one set of them is used to open the doors
of the little rooms where the submarines are kept, as
may be seen from the chains and pulleys used. Each boat
is kept in a little room with two doors, one to the
basement room where we are now and the other letting
into the lake.
"When Coo-ee-oh used the boat in which she attacked
the Flatheads, she first commanded the basement door to
open and with her followers she got into the boat and
made the top close over them. Then the basement door
being closed, the outer door was slowly opened, letting
the water fill the room to float the boat, which then
left the island, keeping under water."
"But how could she expect to get back again?" asked
the Wizard.
"Why the boat would enter the room filled with water
and after the outer door was closed a word of command
started a pump which pumped all the water from the
room. Then the boat would open and Coo-ee-oh could
enter the basement."
"I see," said the Wizard. "It is a clever
contrivance, but won't work unless one knows the magic
words."
"Another part of this machinery," explained the
white-haired Adept, "is used to extend the bridge from
the island to the mainland.
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