“It has existed for hundreds of years, but we do not know who at the time of its construction were the owners of the properties which now belong to the plaintiffs and the defendants respectively, or indeed anything about the ownership at that time of any part of the land along the watercourse.”
“What ought the conclusion to be with regard to these acts of the riparian owners? It seems to me that they ought to be taken primâ facie to have been done in the exercise of a legal right rather than as having been done without any legal title. It ought therefore, I think, to be inferred that the owners of the lands abutting on this watercourse reserved to themselves at the time when the watercourse was constructed the right to a reasonable use of the water as it passed their lands, and that the plaintiffs are in like manner entitled to a similar right - a right to the use of the water for all reasonable purposes, and not merely for the purposes of their mill. In substance, over and above the special use of the water for the purposes of the mill, both the plaintiffs and the other adjoining owners are entitled to those rights to which the owners of lands adjoining a natural stream would be entitled inter se.”