Fashion, tired of the dull uniformity of straight lines, was then driven to adopt something new: yet, still acting by geometrical rules, it changed to regular forms of circles and curves, in which the trees were always placed at equal distances [fig. 230, e]. This introduced, also, the serpentine avenue for a road [fig. 230, f], of which there is a specimen in the approach from Bedford to Woburn Abbey, which is not unpleasing.