The Pierre-Trouée (_or des Druids_) is a very fine dolmen, composed of four stones, situated about two kilometres south-east of Trie-Château. An artificial circular hole has been cut through the base of the side stone, and Fergusson infers from this that the dolmen was probably never intended to be covered up with earth, or at the most only partially. The age of dolmens of this type is a matter of the greatest uncertainty. Although in a general way regarded as prehistoric burial-places, some of them may belong to post-Roman times. TRIE-CHÂTEAU is an interesting place. Its Hôtel de Ville is the Maison de Justice of the twelfth century, and it still has its round-headed windows with small pillars. The Romanesque façade of the church is richly ornamented, and the rest of the building belongs to the twelfth, thirteenth, and sixteenth centuries. A fortified gateway (fifteenth century) of the château is passed through on the way to Gisors, and by it is a big round tower of the same period, although much restored. There can also be seen vaulted underground portions of this formerly important castle. Charles François Dupuis, who wrote ‘Origins de tous les Cultes’--a book which did much to precipitate the irreligious crisis of the Revolution--was born at Trie-Château in 1742. On entering Gisors there is a bad _caniveau_. SECTION XXVII GISORS TO ROUEN, 41 MILES (66 KILOMETRES) DISTANCES ALONG THE ROUTE Kil. Miles. =Gisors= to Les Thilliers-en-Vexin =13= 8 =Les Thilliers= to Les Andelys =15= 9¼ =Les Andelys= to Heuqueville =12= 7½ =Heuqueville= to St. Nicholas-de-Pont-St. Pierre =8= 5 =St. Nicholas-de-Pont-St. Pierre= to Boos =9= 5½ =Boos= to Rouen 5½ NOTES FOR DRIVERS =Dangu.=--There is a steep ascent on the way to Les Thilliers, after which the road is level, until the long and easy descent of the Gambon Valley to Les Andelys. =Le Petit Andely.=--Has a _caniveau_ on entering from Le Grand Andely. =La Vacherie.=--Steep, winding ascent from the Seine. =Before reaching Heuqueville.=--There is a very steep descent through a wood, which should be taken carefully. =Amfreville-les-Champs.=--After leaving, there is a long descent to the Andelle at =St. Nicholas-de-Pont-St. Pierre= (caution), and after that village there is a long winding ascent. =Approaching Rouen.=--There is a steep descent from =Blosseville-Bonsecours=. PLACES OF INTEREST ON THE ROUTE