Note 91 — Chapter VIII · Watt’s Connexion with Dr. Roebuck—Watt acts as Surveyor and Engineer.

There was then a ford at Dumbuck, a few miles below Glasgow, which prevented boats of more than ten tons burden ascending to the Broomielaw. This was shortly after removed by the Clyde Trust, who have expended 3,564,397l. in improvement of the navigation between 1770 and 1863, the revenue collected during the same time in dues having been 2,288,000l. Vessels drawing 21 feet can now ascend to the Broomielaw; and when the present improvements are completed the depth at high water is expected to be upwards of 24 feet.