|The pattern is recorded by W and A Smith in 1850
and by Grant in 1886. Logan (1831) gives a variation with a single
azure stripe, but the earlier sample in the Cockburn Collection (1810-15)
Mitchell Library, Glasgow., indicates that in this instance, Logan
was wrong. There is a curious mathematical similarity with the Royal
Stewart tartan in which the number of threads and the colours have
been reversed. It suggests a common origin in design but no explanation
can be given.