But a circumstance soon occurred to make him serious. Having sailed from one of the ports of Sussex, Harold's vessels were driven by contrary winds towards the mouth of the Somme; and the earl, forced to land on the territories of Guy, Count of Ponthieu, was seized by that feudal personage as a captive, despoiled of all his property, and placed securely under lock and key, in the castle of Beaurain.
One day, when William the Norman was at Rouen, a messenger from Harold arrived hurriedly and in haste, with intelligence of his captivity. William expressed high indignation, and demanded extradition of the Saxon earl with a menace, which was meant to serve for ransom. Guy of Ponthieu, however, demanded a fine estate and a large sum of money, and would listen to no proposal less advantageous to himself. William was, in consequence, obliged to grant what the count demanded; and, the matter having been arranged, Harold was set free and conducted to Rouen.
On reaching the Norman capital, Harold met with a reception which soon effaced the remembrance of his captivity in the stronghold of Count Guy. At the same time William intimated that the hostages were at Harold's disposal; but he pressed the earl to remain for a time as his guest, and see something of the land. Harold, who was bold and confident, accepted the invitation; and having, with his companions, been admitted into the Norman order of knighthood, he began to figure prominently in the festivals and pageants of the Norman court.
While Harold the Saxon was in this position, William the Norman undertook an expedition against the Bretons. Before setting out, the martial duke requested Harold's company; and Harold, consenting without hesitation, went with his Saxon comrades to take part in the war. During this campaign, William treated Harold with the utmost consideration; and the Norman duke and the Saxon earl slept in one tent, ate at the same table, and conducted themselves towards each other like men on terms of the most intimate friendship.
In this expedition against the Bretons, Harold and his Saxon companions bore themselves with a courage which excited high admiration; and, in spite of Edward's prophecy, everything seemed to go smoothly; when one day, as the duke and the earl rode along, side by side, enlivening the way with friendly colloquy, William artfully turned the conversation to his early acquaintance with the King of England, and suddenly revealed the ambitious project which was occupying his mind.
"In the days of my youth," said William, turning on his saddle, playing with his bridle-rein, and looking Harold in the face, "your king and I lived under the same roof like brothers; and he then promised that, if ever he came to be King of England, I should be nominated heir to his crown."
Harold, in perplexed surprise, muttered some words.
"Wherefore, Harold," continued William, "if thou wouldst aid me in realizing this promise, be sure that, if I obtain the kingdom, whatever thou askest thou shalt have. What is thine answer?"
"Be it as thou sayest," murmured Harold, taken by surprise, and finding it impossible to answer otherwise than with some vague words of compliance.