improved eight other channels. The operation was judged as substantially complete in 1637. It was criticized for its limited goal to provide "summer lands", leaving the land subject to winter flooding. The Merchant Adventurers had been offered by the Crown as the reward for their work. This settlement was disrupted: first by the riots, which erupted against the enclosures (and that occurred periodically into the 1650s), and second, by the King. He reversed the granting of Bedford's contract and declared himself as the principal in the project, taking and leaving the other parties with only . At this time, Vermuyden was recruited to participate in the Great Level, as in 1637 he wrote a Discourse Touching the Draining of the Great Fennes for the King (it was not published until 1642). In it, he proposed two innovations to the drainage scheme: washes – areas of land allowed to flood in periods of bad weather to absorb the extra water that cannot drain to the sea – and a catchdrain around the eastern edge of the fen. The washes were constructed as part of the second phase of drainage in the 1650s, but the catchdrain was not developed until the early 1960s. This catchdrain follows the contours of the western edge of the hilly brecklands where they rise above the fen, commencing in the south at Mildenhall through Hockwold cum Wilton northwards to Denver Sluice. At the latter village the River Little Ouse flows westwards off the brecks from Brandon enclosed within high embankments, over an aqueduct many feet higher than the catchment drain and surrounding farmland. Thus illustrating many of the anachronistic but brilliant features (in engineering terms), the work of Vermuyden commenced. Charles I appointed Vermuyden as his agent for the draining on 19 September 1639, but his government did not approve the plan until 5 August. In a precarious position with all three of its kingdoms, the Crown lacked both sufficient funds and attention to pay for the works in the Great Level, but it authorized Vermuyden to start. He widened the River Nene below Horseshoe Sluice, banking the north side of Morton's Leam. Beginning on the south, he set a new sluice, known as Shire Drain, and cut a new channel at the mouth of the Nene through the salt marshes to the sea. Vermuyden was still working in the Great Level as of May 1642, but