On 5 October 1641, a petition was made against William Fuller, dean of Ely and vicar of St Giles-without-Cripplegate, by the parishioners of Cripplegate, complaining that he had hindered the appointment of Sedgwick as Thursday lecturer at St Giles's.
A woman in the neighbourhood of Swaffham Prior, Cambridgeshire, proclaimed the near advent of the day of judgment.
Sedgwick adopted her date, and announced it at the house of Francis Russell of Chippenham, Cambridgeshire (father-in-law of Henry Cromwell).
Charles read part of the book and gave it back, saying he thought "the author stands in some need of sleep."
In 1663, having conformed[clarification needed], he became rector of Mattishall Burgh, Norfolk, and he died in London about 1669.