Wood himself certainly did nothing to divert architectural design from its accustomed channel. He, and his son after him, stamped Bath with its particular character, and made it the finest city in England. It had become a fashionable resort early in the eighteenth century, largely owing to the exertions of Beau Nash, and it is a fortunate circumstance that when it had to expand there was so accomplished a man as John Wood on the spot to control the expansion. He it was who first designed streets and squares and rows of houses as definite architectural conceptions. There is much to be said for this idea, especially when the work is new and the design still retains the colour and disposition intended by the architect, and while the buildings are occupied for the purposes for which they were built. But with the lapse of time inevitable changes occur. The property falls into different hands; each owner treats his portion after his own will. It may be that one paints his part of the façade one colour, while another paints his of a different tint, the lines of demarcation having no relation to the architectural treatment. Some of the tenements may become business premises, with large indications of their purpose exposed to catch the public eye. Others may even be rebuilt in a fashion wholly out of keeping with the original design. In short, although a square may be built as one architectural conception, it is impossible to preserve it as such in perpetuity, and when once the original idea is destroyed by the march of events, the effect is worse than if it had never been conceived. [Illustration: FIG. 184.--Pulteney Bridge, Bath. From an Aquatint by Thomas Malton.]