“Drayning of the Great Fennes”, 1642

The map faces west. The cutoff channel is at the bottom. 

The cut-off channel was proposed originally by Sir Cornelius Vermuyden in 1642 to take the floodwaters of the Mildenhall and Brandon Rivers around the South Level and discharge the water safely into the Ouse downstream of the confluence of Denver Sluice. The money ran out before this could be built.