ure armed with a gleaming
knife. Next she put the knife to her mouth, and, nipping it between her
teeth, slid into the water silently as a diving bird. A minute passed,
not more, and they saw that something was climbing up the cable of the
ship.
"What is she going to do?" whispered Foy.
"God in Heaven knows," answered Martin, "but if she does not come back
good-bye to Heer Brant's treasure, for she alone can find it again."
They waited, holding their breaths, till presently a curious choking
sound floated to them, and the lantern on the ship vanished. Two minutes
later a hand with a knife in it appeared over the gunwale of the boat,
followed by a grey head. Martin put out his great arm and lifted, and,
lo! the white form slid down between them like a big salmon turned out
of a net.
"Put about and row," it gasped, and they obeyed while the Mare clothed
herself again in her skin garment.
"What have you done?" asked Foy.
"Something," she replied with a fierce chuckle. "I have stabbed the
watchman--he thought I was a ghost, and was too frightened to call out.
I have cut the cable, and I think that I have fired the ship. Ah! look!
but row--row round the corner of the island."
They gave way, and as they turned the bank of reeds glanced behind them,
to see a tall tongue of fire shooting up the cordage of the ship, and to
hear a babel of frightened and angry voices.
Ten minutes later they were on board the _Swallow_, and from her deck
watching the fierce flare of the burning Spanish vessel nearly a mile
away. Here they ate and drank, for they needed food badly.
"What shall we do now?" asked Foy when they had finished.
"Nothing at present," answered Martha, "but give me pen and paper."
They found them, and having shrouded the little window of the cabin,
she sat at the table and very slowly but with much skill drew a plan, or
rather a picture, of this portion of the Haarlem Mere. In that plan were
marked many islands according to their natural shapes, twenty of them
perhaps, and upon one of these she set a cross.
"Take it and hide it," said Martha, when it was finished, "so that if I
die you may know where to dig for Brant's gold. With this in your hand
you cannot fail to find it, for I draw well. Remember that it lies
thirty paces due south of the only spot where it is easy to land upon
that island."
"What shall I do with this picture which is worth so much?" said Foy
helplessly, "for in truth I fear
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