On 21st July 1902, a water engineer, Mr W. Patterson, announced the discovery of a Bronze Age stone circle.
The circle had 10 irregular stone uprights measuring 36 ft in diameter, with an inner horseshoe-shaped stone wall-like feature which was 12 ft across. One of the uprights was 6 ft 3 in long. The stones were of the local millstone grit. Remains of a cremation were also found.
The circle is now submerged beneath Walshaw Dean Middle Reservoir and only visible in times of severe drought.
In formation from halifax-today.co.uk/specialfeatures/triviatrail/w.html
West Yorkshire Archaeological Survey say 10 stones of 0.6mtrs encircled a smaller circle