Haggett’s father was of Sussex origin, but he moved to London, where he prospered as a surveyor. By 1608 he was working for the Crown in the four northern counties and he struck up a friendship with Sir Robert Cotton*.
In 1625 Haggett was responsible for delivering Arundel’s letters of nomination for various Sussex boroughs to the earl’s officers in that county.
Re-elected in 1626, Haggett left no trace on the records of the second Caroline Parliament. There is no evidence that he sought re-election. He had died intestate by November 1634, when his widow took out letters of administration. No other member of the family sat in the Commons.
