[5] According to Sheahan, until about 1830 "during the wintertime, the main road [London–Northampton] was generally impassable, without wading through water three feet deep, for a distance of about 200 yards";[5] he goes on to state that "chiefly through the exertions of Mr. C. Warren, the road has been raised by 3 and a half feet".

Charles Warren was the owner of Simpson House and was a substantial landowner and contractor.

It would have been in his interest to alleviate flooding in the village, although there is no other documentary evidence that he was directly involved in the improvement works.

Simpson was an ancient parish, which included part of Fenny Stratford.

[4] By 1847, Simpson, or Sympson, like other ecclesiastical parishes in Buckinghamshire, had been transferred to the Diocese of Oxford.