When Tube maps were monochrome...
On the Brompton Road thread someone mentioned that soon LUL will run
out of colours for the lines.
That reminded me of the days when some diaries, and I think the back
of the London A-Z used to include a map of the London Underground in
monochrome.
I vaguely remember various lines, stripes, circles and cross-hatchings
used to distinguish one line from another.
Great days!
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