“What, has he already felled the trees?”
“Oh, the trees were already down. Come, and you will see for yourself.”
After half an hour’s walking, on the other side of the promontory which formed the little natural harbour, I perceived Hans at work. In a few more steps I was at his side. To my great surprise a half-finished raft was already lying on the sand, made of a peculiar kind of wood, and a great number of planks, straight and bent, and of frames, were covering the ground, enough almost for a little fleet.
“Uncle, what wood is this?” I cried.
“It is fir, pine, or birch, and other northern Coniferae, mineralised by the action of the sea. It is called surturbrand, a variety of brown coal or lignite, found chiefly in Iceland.”
“But surely, then, like other fossil wood, it must be as hard as stone, and cannot float?”
“Sometimes that may happen; some of these woods become true anthracites; but others, such as this, have only gone through the first stage of fossil transformation. Just look,” added my uncle, throwing into the sea one of those precious waifs.
The bit of wood, after disappearing, returned to the surface and oscillated to and fro with the waves.
“Are you convinced?” said my uncle.
“I am quite convinced, although it is incredible!”
By next evening, thanks to the industry and skill of our guide, the raft was made. It was ten feet by five; the planks of surturbrand, braced