witness mark
n.— «With a rule draw out a witness mark from each saw cut on the surfaced side of the line boards and plainly write there-on a brief designation of what line of the building the saw cut is on, as “Brick Line.”» —by Joseph Baker Davis Surveying for Beginners (Ann Arbor, Michigan) , 1909. (source: Double-Tongued Dictionary)
Further reading
Eels, orts, and Wordle! Sweden awarded its most prestigious literary award to a book about…eels. The Book of Eels reveals the mysterious life cycle of this sea creature and its significance for famous figures from Aristotle to Sigmund Freud. Plus...
Mary Beth in Greenville, South Carolina, wonders: Why do we say four-oh-nine for the number 409 instead of four-zero-nine or four-aught-nine? What are the rules for saying either zero or oh or aught or ought to indicate that arithmetical symbol...