A colleague has suggested that there is a belief that wall anchors/ties/clamps/cramps - they go by many names - were used to mark properties in the underground railroad. Has anyone come across this belief? (I'm assuming it was just a belief). Any reference to the belief in print would be very welcome! With best wishes, Pat Research student, Department of Archaeology, University of York -- Pat Reynolds [log in to unmask] "It might look a bit messy now, but just you come back in 500 years time" (T. Pratchett)