The Lee Navigation
The Lee Navigation was actually built in stages from the 1600's to the Mid 1800's, with the main body of the work being undertaken in the 1770's to shorten the route from Limehouse to Hertford
Lee & Stort sample leaflets

Left: Leaflet published around 2004, which calles it the River Lee. The words River Lee Navigation, Lee Navigation and Lea used once each in a context that creates a muddled idea and the map calls it the Lee Navigation. Right: leaflet from 1989 which describes it as the Lee Navigation throughout and remains concise in its terminology
London Canals