What's the difference between poursuivant and pursuivant?

Poursuivant

Definition:

Example Sentences:

Definition:

(n.) A functionary of lower rank than a herald, but discharging similar duties; -- called also pursuivant at arms; an attendant of the heralds. Also used figuratively.
(n.) The king's messenger; a state messenger.
(v. t.) To pursue.

Example Sentences:

(1) The state opening of parliament isn’t the greatest of adverts for a one-nation government: the collars of the men who hold the office of Portcullis Pursuivant, Maltravers Herald Extraordinary and Clarenceux King of Arms are only of the most aristocratic white.