Hervey came from a family that had represented Bedfordshire in 1386, and acquired Ickworth by marriage in the mid-fifteenth century.
Hervey was returned to the last Jacobean Parliament at a by-election for Preston, a duchy of Lancaster borough, on the nomination of his brother-in-law May, the chancellor of the Duchy. However, the Parliament was not in session at the time, and was automatically dissolved by the king’s death before Hervey could take his seat. Re-elected for Preston to the first Caroline Parliament in 1625, his attendance was recorded at both meetings of the bill committee concerning Crown tenants in Macclesfield, Cheshire (23 June), to which he had been appointed as the representative of a Lancashire borough.
