Very little is known of the early life of William Harvey. His preliminary education was probably carried on in Folkestone, where he learnt the rudiments of knowledge, gaining his first acquaintance with Latin. One of his earliest distinct recollections must have been in the memorable days in July, 1588, when all was bustle and commotion in his native town. The duty of resisting the Spanish Armada in Kent and Sussex fell upon the "Broderield," or confederation of the Cinque Ports, a body which consisted of the Mayor, two elected Jurats, and two elected Commoners from Hastings, Sandwich, Dover, Romney, Hythe, Winchelsea, and Rye. And as Folkestone for all purposes of defence was intimately allied with Dover, it is not at all unlikely that Thomas Harvey, one of its Jurats, was of its number, or that he was a member of the "Guestling," which, affiliated with the Broderield, had to fix the number, species, and tonnage of the shipping to be found by each port, a somewhat difficult task, as each port's share was a movable quantity requiring constant rearrangement. But even with the machinery of the Broderield and the Guestling, it must have needed much activity to raise the £43,000 which the Cinque Ports contributed to set out the handy little squadron of thirteen sail which did its duty under the orders of Lord Henry Seymour in dispersing the remains of the great Spanish fleet. Harvey must have had some remembrance of the turmoil of the period, though it may have been partially effaced by his new experiences at the King's School, Canterbury, where he was entered for the first time in the same year. He remained at the King's School for five years, no doubt coming home for the holidays, some of which must have been spent in watching the constant transport of troops to Spain and Portugal which was so noticeable a feature in the history of the Cinque Ports during the later years of the life of Elizabeth. His schooling ended, Harvey entered at once as a pensioner, or ordinary student, at Caius College, Cambridge, his surety being George Estey. The record of his entry still exists in the books of the College. It runs: "Gul. Harvey, Filius Thomae Harvey, Yeoman Cantianus, ex oppido Folkeston, educatus in Ludo Literario Cantuar. natus annos 16, admissus pensionarius minor in commeatum scholarium, ultimo die Mai 1593." (William Harvey, the son of Thomas Harvey, a yeoman of Kent, of the town of Folkestone, educated at the Canterbury Grammar School, aged 16 years, was admitted a lesser pensioner at the scholars' table on the last day of May, 1593.)