In 1513 he was on campaign in France and was knighted for making a gallant charge at Therouenne, Picardy in the sight of the King, for which he was granted a new crest, consisting of a lions head with a man's hand in its mouth.
In 1520 he accompanied Henry VIII with other knights to the meeting with Francis I of France at the Field of the Cloth of Gold.
He leased the manor of Vastern (or Fasterne) from Katherine Parr who, after the death of her husband Henry VIII, had remarried Sir Thomas Seymour, brother of Protector Somerset.
She was not on good terms with the Protector because he had declined to give her some valuable jewels which, as she maintained, King Henry had given her for her own.
Long married firstly, Jane (or Frydeswyde), daughter of Sir John Hungerford and Margaret Blount.