A concise glossary of terms used in Grecian, Roman, Italian, and Gothic architecture (1879)
Parker, John Henry, 1806-1884 · Oxford ; London : J. Parker · leaf 332
areused singly, or combined in groups oftwo, three, five, and seven. Whengrouped in this manner, they are notunfrequently placed so near to eachother that the stonework between themis reduced to a real mullion, and insuch cases they are generally sur-mounted by a large arch embracingthe whole… … Lambourne, Berks., c. 1160.
Architecture
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