In message , at 21:22:31 on Mon, 4 Jan
2016, Michael R N Dolbear remarked:
And you are obsessed with Cambridge,

Eh? We have no freight traffic to speak of on the Cam.

Was there ever ?

Yes, all the way up to the Mill.

http://www.queens.cam.ac.uk/files/st...sex_building_-
_baldrey_1804_at_25.jpg?itok=TXqI490V

And was the Cam ever tidal, say in Newton's time, at Cambridge ?

It's an awfully long way from the sea, so no.
--
Roland Perry