The traveler can do nothing more enlightening and delightful as a prelude to his journey among French cathedrals than to spend some early spring days exploring the rural churches of the privileged land of the national art which the old geographers chose to picture as an island inclosed by the Seine, the Marne, the Aisne, and the Oise. Numerous churches of the transition lie between Soissons, Senlis, and Beauvais, and once, around Amiens was another such center, but few of the monuments there have survived.[24] Go to Creuil and see, in the ruins of St. Évremont, a rudimentary flying buttress--a quarter arch once hidden under the lean-to roof. No doubt the architect built it with the intention of bracing the upper walls, but since he omitted to brace the flying buttress itself it failed of its purpose. Four miles away, at St. Leu d'Esserent, is an awkward early trial of a Gothic vault in the tribune above the porch, but as the ribs are embedded in the cells, no proper elasticity is achieved. Go to Morienval and study its remarkable essay in spanning a curving section with diagonals. Trace these early steps of the national art, and the meaning of the Gothic bone structure grows plainer. MORIENVAL[25] I approve the life of those for whom the city is a prison, who find paradise in solitude, who live by the works of their hands, or who seek to remake their spirit by the sweetness of their contemplative life, who drink of the fountain of life by the lips of their heart, and forget what is behind them to regard only what lies ahead. But neither the most hidden forest nor the highest mountains will give happiness to man, if he has not in himself solitude of the spirit, peace of conscience, upliftings of the heart to God.--Letter of ST. IVES, Bishop of Chartres, 1091-1115. Of the experimental steps which led to Gothic art, the most appealing is the nunnery church of Morienval, a humble forerunner of Amiens Cathedral that has made as much stir in archæological controversy as Périgueux's cathedral of St. Front itself. Morienval may not be the passionately sought _oeuvre-initiale_, since its vaults, while they betray inexperience, certainly were preceded by still cruder attempts, but it can boast that it is the first Gothic ambulatory extant, and as the curving aisle around the chancel is the most exquisite feature of the great cathedrals, Morienval's humble first essay of it merits a pilgrimage. As one approaches the abbey church it does not appear till one is directly over it, so snugly hidden away is the village in a fold of the rolling country that skirts the forest of Compiègne. Perhaps the IX-century nuns who chose the site may have hoped that the marauders of that troublous time might ride by, unconscious of booty so close at hand. With gratitude one learns that the invasion of 1914 has left Morienval unscathed, as well as those other memorials of tentative Gothic, Acy-en-Multien and Crouy-sur-Ourcq.