The following extract comes from Aubrey Burl’s Prehistoric Avebury (1979). Yale University Press, New Haven. p 237. [My comments in parentheses].
Much farther away, nine miles to the north of Avebury are the fallen pillars of the Coate Circle, prostrate and three-quarters covered in turf but when A.D. Passmore probed the ground [research published in 1894] he found several were up to three metres long. Like Langdean [also known as Little Avebury] there was the suggestion of an avenue leading to the ring from the north [the course of the existing DayHouse Lane, past the Richard Jefferies Museum back towards Swindon]. It has been thought that Richard Jefferies first recognised the remains of this ring and, undoubtedly, he had an affinity with the people who had moulded the ancient landscape before him. [...]
In the case of Coate, however it was John Aubrey, two hundred years before Jefferies who wrote that “at Broome near Swindon in Wiltshire”, hardly a mile from Coate, “in the middle of a pasture ground called Long-stone is a great Stone ten foot high (or better) standing upright”, the ruin of a circle with a row of stones ” in a right line” leading to it.