Then, as in all countries and all times the old proverb holds good that one good turn deserves another, they picked up here and there several valuable hints, and none more valuable than the knowledge that somewhere below Abbeville, between that town and the sea, was a tidal ford that could be crossed twice in the twelve hours by those who knew where to seek it.  Thus whilst the King’s Marshals were riding up and down the river banks, vainly seeking some bridge over which the hard-pressed army could pass, the twin brothers carefully pursued their way down the stream, looking everywhere for the white stone bottom which they had been told marked the spot where the water was fordable.

But the tide was rolling in deep and strong, and they could see nothing.  Still cautiously pursuing their way —­ cautiously because upon the opposite bank of the river they saw a large gathering of archers and footmen all belonging to the enemy —­ they lighted presently upon a peasant varlet cutting willow wands not far from the river’s brink.  The boys entered into talk with him, and Raymond’s kindly questioning soon elicited the information that the man’s name was Gobin Agace, that he was a poor man with little hope of being anything else all his days, and that he knew the river as well as any man in the realm.

“Then,” said Raymond, “thou needest be poor no longer; for if thou wilt come with us to the camp of the English King a short league away, and lead him and his army to the ford of the Blanche Tache which lies not far from here, he will make thee rich for life, and thou wilt be prosperous all thy days.”

“If the King of France do not follow and cut off my head,” said the man doubtfully, though his eyes glistened at the prospect of such easily-won wealth.

“By holy St. Anthony, thou needst not fear that!” cried Gaston.  “Our great King can protect thee and keep thee from all harm.  See here, good knave:  it will be far better for thee to win this great reward than for us, who have no such dire need of the King’s gold.  If thou wilt not aid us, we must e’en find the place ourselves; but as time presses we will gladly lead thee to the King, and let him reward thee for thy good service.  So answer speedily yea or nay, for we may not linger longer whilst thou debatest the matter in that slow mind of thine.”

“Then I will e’en go with you, fair sirs,” answered the fellow, who was in no mind to let the reward slip through his fingers; and within an hour Gaston and Raymond led before the King the peasant varlet who held the key of the position in his hands.

Every hour was bringing fresh messages of warning.  The French King was in pursuit of his flying foe (as he chose to consider him), and though he felt so certain of having him in a trap that he did not hasten as he might have done, there was no knowing when the van of the French army would be upon them; and the moment that the King heard of this ford, and was assured by the peasant that at certain states of the tide twelve men abreast could ford it, the water reaching only to the knee, he broke up his camp at an hour’s notice, and with Gobin Agace at his side proceeded in person to the water’s edge, the flower of his army crowding to the spot beside him, whilst the mass of his troops formed in rank behind, ready to press forward the moment the water should be fordable.