This was, in fact, his mill-race.

Just before it joined the older part again, right opposite his window, he made it run for a little way in a direct line towards the house, and in this part of the new channel he made preparations for his water-wheel.

Into the channel he laid a piece of iron pipe, which had been lying about useless for years; and just where the water would issue in a concentrated rush from the lower end of it, he constructed a foundation for his wheel, similar to that Sandy and he had built for it before.

The water, as it issued from the pipe, should strike straight upon its floats, and send it whirling round.

It took him some time to build it, for he wanted this to be a good and permanent job.