The boys soon came to the mill.
"Hello, Ade!" cried a man, who seemed to be covered from head to foot with white dust. "Heard ye went fishin' yist'day," he went on. "Ketched a whale, didn't ye?" and he laughed so heartily that he almost shook the side of the building.
"Well, we did have some such luck," admitted Adrian. "But, say, Truem, can we come in? Are you running now? This is my cousin Roger, from New York."
"He were th' whale I were referrin' t'," said Mr. Wright, laughing again.
Roger smiled and bowed to the dusty miller, who held out a huge white hand for him to shake.
"Yep, come right in," said Mr. Wright, genially. "I'm grindin' a bit a' flour fer George Bennett."
The boys advanced into the dusty place, which shook and trembled with the whirring vibrations of the two big millstones. They watched these spinning around, grinding the wheat into a fine, light dust.
"What power does he use?" asked Roger, who was somewhat surprised to see no sign of an engine.
"Turbine water wheel," said Adrian. "Come along and I'll show you." He led the way to where, at the bottom of a deep pit, the turbine roared around and around with the weight and force of the water that fell on it from above, a dam giving the necessary head. This furnished the power for the entire mill. It was all very interesting to Roger, who had never seen anything of the kind. Before he realized how quickly time passed, it was almost the hour for supper, so he and Adrian raced home, both bearing good appetites.