Contracted in its channel for more than a mile between lofty rocks at Hanham, the Avon, emerging from its straitened circumstances, diverts itself with the strikingly sinuous course which it then follows between Brislington and St. George's, ere it is sobered and dignified by its contact with the traditional Caer Oder, "the City of the Chasm," the birthplace of Sebastian Cabot, of Southey, and of Chatterton. Before the river begins to be tidal, it has another, perhaps its greatest, recruit in the Lower Frome. After a picturesque course, the Frome washes the Bishop's Palace at Stapleton, enters Bristol, and there loses itself in the Lower Avon. Between modern Bristol and the great port of the "spacious times" the difference is one of degree only, for the commercial spirit is still strong in the sons of Cabot and Canynge; and, amid the thick smoke that overhangs the very centre of the city, there rise e'en to-day the tall spars, fluttering pennons, and the rigging of the ships of the mercantile marine that made the name of the opulent city known in every port and on every sea, and brought to Bristol by the tidal river the trade that trimmed her sails to the breeze of fortune and set her course fair on the voyage to fame and prosperity. One of the earliest chapters of the history of the city is connected with the river. It records the building of the first bridge over the Avon in 1247, an undertaking mentioned in a charter of Henry II. This bridge united the city with what was then the suburb of Redcliffe. To-day, this association is splendidly preserved by that golden historical link, the "finest and stateliest parish church in England," as Queen Elizabeth pronounced the edifice of St. Mary Redcliffe on her visit to Bristol in 1753. The style is the Early English, though the richly sculptured northern doorway and some other portions belong rather to the Decorated Period. The structure was founded about the year 1300, but was enlarged, beautified, and, in fact, refounded by William Canynge, whose effigy, with that of his wife Joan, will be found at the end of the south transept. The upper part of the stone steeple was struck down by lightning in 1445, and not rebuilt for upwards of four hundred years. It was in the muniment room of this church that young Thomas Chatterton professed to have found a number of curious MSS. in prose and poetry, the boy-poet's ingenious deception long escaping detection. Such success, which might never have attended the confessed productions of his own precocious genius, gave the gifted lad of seventeen the necessary stimulus, and his growing ambition led him to London, where he became a mere literary hack, and took a life threatened by starvation. A handsome monument in St. Mary Redcliffe churchyard pays Bristol's tribute to her great, but unhappy, son. Of St. Mary Redcliffe, the "pride of Bristowe," Camden said it was "the most elegant of all the parish churches I have ever seen."