Even here the Waters are really little more than a large stream, but they flow into the Firth of Forth and beyond into the North Sea.
The waters flow right into the Firth of Forth which is very large.
mnli hypothesis: The waters flow right into the Firth of Forth which is very large. premise: Even here the Waters are really little more than a large stream, but they flow into the Firth of Forth and beyond into the North Sea.