Summary: The plans drawn to a large scale in Fig 161 show how the jams abacus and arch moulds are superimposed over one another and also how the mouldings are worked out of the various stones Fig 159 In this case a quatrefoil is shown above the lancets and filling in the blank over their junction the whole being surmounted and enclosed by an arch with hood mould It will be
Image Dimensions: 304 x 624
Image originally found here.