Definition of "affirmeth"

Idem Rothwell affirmeth that Mr. Fenner’s bookes were denyed the presse, eo nomine because they were his, as will be proved per Thomas Nicholls — and this was by Dr. Wykes.

1862, Rev. Lambert Blackwell Larking, Proceedings principally in the County of Kent, in connection with the parliaments called in 1640, and especially with the Committee of Religion appointed in that year, M.A.: John Bowyer Nichols and Sons, page 84