The birthplace of Philip Fitz Lewes seems to have been lost to history but it is more than likely he was born in a major hub in the East of England due to his nobleman status, such as London or Colchester.
Much information on Philip's time in said positions can be found in Samuel Statham's The History of the Castle, Town, and Port of Dover from 1899 and the sources listed therein.
It is thought that also around 1483 Philip became a deputy at Dover Castle by Richard III under William Fitzalan, whom he would later take his position in possibly late 1487 but confirmed by 1488.
The exact date of Philip's death is unknown but it is known to have been after July 18, 1492 as he was ordered by Henry VII to provide fifty-seven ships from the Cinque Ports.
[1] It is generally believed that William Scott rose to the position of Lord Warden of the Cinque Ports in August of that year.