28 A MEDIEVAL CITY characteristic of the age that this very human device should have existed, and, secondly, that these ledges were carved and ornamented. These misericords, as they are called, were usually curiously, even grotesquely carved. Some of these camngs were founded on natural objects, some were grotesque heads, others represented subjects with men and animals. There were pews for the nobility, but, apart from the few old and weak people who used the rough bench or two in the body of the church, or the stone bench that ran along the walls, the general public stood during the services. Wealthy parishioners left money to the parochial clergy and for the fabric of the church: they generally wished to be buried at some particular place within their parish church. Such distinguished men as Nicholas Blackburn, merchant of York, were commemorated at times in their parish churches by means of stained-glass windows. The portraits of Nicholas and his son and their wives appear In the east window of All Saints', North Street; his arms also are to be seen in this window. D. YORK AS A PORT The Ouse was tidal and navigable right up to York. Trade, especialty in woollen goods, was carried on in the fifteenth century by river and sea directly between York and ports on the west coasts of the continent and, especially, Baltic ports. On arriving at York the boats stopped at the quays, adjacent to which were warehouses, just below Ouse Bridge. The sea-going boats were not large. They were usually one-masted sailing ships, built of wood;