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A comment on When London’s Dragons Ruled Before Skyscrapers. Parent comment

Re:When London’s Dragons Ruled Before Skyscrapers by ucaetano on Friday January 11, 2019 @08:25PM (#18888851)
That might also be a USGS reference marker, used for topographic surveys.
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Re:When London’s Dragons Ruled Before Skyscrapers by dmckeon on Saturday January 12, 2019 @12:33AM (#18889864)
Did it look like one of these? https://en.m.wikipedia.org/wiki/Survey_marker
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Re:When London’s Dragons Ruled Before Skyscrapers by hermitdev on Friday January 11, 2019 @11:02PM (#18889556)
Could be. On further reflection, I also recall small plastic spikes that were significantly smaller (about an inch in diameter) on the private boundary. Only found one or two of those.
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