While reading another thread I remembered about this book. I have an original print copy but it is on line for download in various formats for reading off line. Worth a read if you are interested in a history of the river and how it changed up to the end of the 19th century.
https://archive.org/details/clydefromitssour00milluoft
'The Clyde from its source to the sea, its development as a navigable river, the rise and progress of marine engineering and shipbuilding on its banks, and the leading historical, geological, and meteorological features of the Clyde Valley
by Millar, W. J
Published 1888'