In the 19th century, the cliffs were heavily quarried for railroad ballast, leading to local efforts to preserve them.
2.
It was discovered at Ballaqueeney ( Ballaquine ) Isle of Man in 1874 by Reverend F . B . Grant during the process of excavating dirt for use as railroad ballast.
3.
In 1973 Henry subsequently married Deborah Speno, granddaughter of Frank Speno, inventor of a ballast cleaning mechanism, and founder of Speno Railroad Ballast Cleaning Co . from Ithaca, New York.
4.
Current understanding of this complex is limited due to its age, the lack of a written record, and the current deteriorated state of the structures due to treasure hunting, looting, stone mining for building stone and railroad ballast, and natural weathering.
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