We know they went to Scilly and Cornwall for tin.

They must have come here for gold." "Oh no," I said.

"They could sail from Tyre and Sidon, keeping within sight of land all the way along the Mediterranean, through the Straits of Gibraltar, and then up the coasts of Spain and France, and across to our country; but they couldn't sail here." "Well, not all the way; but I can recollect enough of the map to know that they'd most likely have ships at the top of the Red Sea, and could coast down from there till they got somewhere about Delagoa Bay or Durban, and gradually travel across country till they got here." "Rather a long walk," I said.
"Long walk?
Of course; but it was done by the people in the course of hundreds of years perhaps--settlers who came into the country after its products.

There, I believe it, and we must have made a find.

Here, come back and let's have a look at the old furnace and chimney." We went back, and were soon satisfied that we had the right idea.