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The monument pre-dates, by around 500 years, the huge trilithon stones at Stonehenge, which align to the winter and summer solstices.

The bizarre course of events unfolded in 1958 when archaeologists were trying to raise a fallen trilithon – two of Stonehenge’s vertical stones supporting a third horizontal stone.

In 1958 archaeologists raised an entire fallen trilithon - a set of three large stones, consisting of two that would have stood upright with the third placed horizontally across the top.

Rowland Allen and his family visited Stonehenge in 1955, three years before the large trilithon stone was re-erected.

“The midwinter sun sets between the two upright stones of the great trilithon.”