Seems it probbly is, re-reading the Peter Knight book, John Aubrey found 3 stones there. Another of which could be in the next field. That'll teach me not to pay attention...
I loved your photos of the Agglestone btw, The Puckstone is completely different & foxed me for ages. It literally is just a mound covered in vegetation about 4-5ft high, hiding any stones at all from a distance. Hope my photos will shed some light on it!
I still haven't been to the museum though I did get out for two days at Xmas & started working my way through Dorsets standing stones..