The street leading up Ludgate Hill, instead of being the confined, winding approach to S. Paul's that it now is, even its crooked picturesqueness marred by the viaduct that cuts all the lines of the Cathedral, gradually widened as it approached S. Paul's, and divided itself into two great streets, ninety feet wide at the least, which ran on either side of the Cathedral, leaving a large open space in which it stood. Of the two streets, one ran parallel with the river until it reached the Tower, and the other led to the Exchange, which Wren meant to be the centre of the city, standing in a great piazza, to which ten streets, each sixty feet wide, converged, and around which were placed the Post Office, the Mint, the Excise Office, the Goldsmiths' Hall, and the Ensurance, forming the outside of the piazza. The smallest streets were to be thirty feet wide, 'excluding all narrow, dark alleys without thoroughfares, and courts.' The churches were to occupy commanding positions along the principal thoroughfares, and to be 'designed according to the best forms for capacity and hearing, adorned with useful porticoes and lofty ornamental towers and steeples in the greater parishes. All churchyards, gardens, and unnecessary vacuities, and all trades that use great fires or yield noisome smells to be placed out of town.' He intended that the churchyards should be carefully planted and adorned, and be a sort of girdle round the town, wishing them to be an ornament to the city, and also a check upon its growth. To burials within the walls of the town he strongly objected, and the experience derived from the year of the plague confirmed his judgment. No gardens are mentioned in the plan, for he had provided, as he thought, sufficiently for the healthiness of the town by his wide streets and numerous open spaces for markets. Gardening in towns was an art little considered in his days, and contemporary descriptions show us that 'vacuities' were speedily filled with heaps of dust and refuse. The London bank of the Thames was to be lined with a broad quay, along which the halls of the city companies were to be built, with suitable warehouses in between for the merchants, to vary the effect of the edifices. The little stream whose name survives in _Fleet_ Street was to be brought to light, cleansed, and made serviceable as a canal one hundred and twenty feet wide, running much in the line of the present Holborn Viaduct.[116]