When it was three or four feet above the surface Glinda gave the signal to stop, for their work had been accomplished.
The blackened submarine was now entirely out of water, but Uncle Henry and Cap'n Bill managed to push it into the lake.

Glinda, the Wizard, Ervic and the Adepts got into the boat, taking with them a coil of strong rope, and at the command of the Sorceress the craft cleaved its way through the water toward the part of the Dome which was now visible.
"There's still plenty of water for the fish to swim in," observed the Wizard as they rode along.

"They might like more but I'm sure they can get along until we have raised the island and can fill up the lake again." The boat touched gently on the sloping glass of the Dome, and the Wizard took some tools from his black bag and quickly removed one large pane of glass, thus making a hole large enough for their bodies to pass through.

Stout frames of steel supported the glass of the Dome, and around one of these frames the Wizard tied the end of a rope.
"I'll go down first," said he, "for while I'm not as spry as Cap'n Bill I'm sure I can manage it easily.

Are you sure the rope is long enough to reach the bottom ?" "Quite sure," replied the Sorceress.
So the Wizard let down the rope and climbing through the opening lowered himself down, hand over hand, clinging to the rope with his legs and feet.