slave bell, noun phrase
A large bell hung between two white-washed pillars, or in a tall white-washed arch, used in the past to summon slaves and mark certain times of the day, as the beginning and end of work periods. Also attributive.
1926 P.W. Laidler Tavern of Ocean 203Behind..are traces of terracing indicating former vineyards. Among the oaks stood the slave-bell, and from one tree hung a pair of scales, dated 1756.
1990 Weekend Argus 10 Feb. (Weekender) 4The Oranje Zight homestead was surrounded by outbuildings, including slave quarters and an impressive slave bell.
A large bell hung between two white-washed pillars, or in a tall white-washed arch, used in the past to summon slaves and mark certain times of the day, as the beginning and end of work periods. Also attributive.

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