[Acrylic-bob]

AT LAST!

Hooray Willow Wins possibly the last ever pair of coconuts. The lintel is indeed carved from a single peice of stone which is cut to look like several. It is common to see this configuation of stone shapes used to form an arch. Look at the arches on the Viaduct.

The central stone, as Darby Points out, is the Keystone, so called because it is the key to the whole thing, and locks all the other stones in place, remove it and the arch would collapse. But this is not an arch. And if the stones were individual as the mason has attempted to make them appear, they would not even support their own weight, much less the weight of the masonry above. Thus it is impossible.